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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-testutils](https://togithub.com/googleapis/python-test-utils) | `==0.3.0` -> `==1.0.0` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-testutils/1.0.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-testutils/1.0.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-testutils/1.0.0/compatibility-slim/0.3.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-testutils/1.0.0/confidence-slim/0.3.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/python-test-utils</summary>

### [`v1.0.0`](https://togithub.com/googleapis/python-test-utils/blob/master/CHANGELOG.md#&#8203;100-httpswwwgithubcomgoogleapispython-test-utilscomparev030v100-2021-08-02)

[Compare Source](https://togithub.com/googleapis/python-test-utils/compare/v0.3.0...v1.0.0)

##### ⚠ BREAKING CHANGES

-   drop support for Python 2.7 ([#&#8203;43](https://www.github.com/googleapis/python-test-utils/issues/43)) ([f5e9c65](https://www.github.com/googleapis/python-test-utils/commit/f5e9c6535481e1ed70fa5e356668e5b0695481e0))

</details>

---

### Configuration

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♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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* feat: add configurable leader placement support

* lint

* Create multi-regional instances

* try another print stmt

* try nam3

* variable for config

* samples: add default leader options samples

* fix

* fix

* fix

* use sample instance

* use new default leader instance

* fix

* underscore rather than dashes?

* fix

* add reload

* review changes

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-spanner](https://togithub.com/googleapis/python-spanner) | `==3.6.0` -> `==3.7.0` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-spanner/3.7.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-spanner/3.7.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-spanner/3.7.0/compatibility-slim/3.6.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-spanner/3.7.0/confidence-slim/3.6.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/python-spanner</summary>

### [`v3.7.0`](https://togithub.com/googleapis/python-spanner/blob/master/CHANGELOG.md#&#8203;370-httpswwwgithubcomgoogleapispython-spannercomparev360v370-2021-07-29)

[Compare Source](https://togithub.com/googleapis/python-spanner/compare/v3.6.0...v3.7.0)

##### Features

-   add always_use_jwt_access ([#&#8203;381](https://www.github.com/googleapis/python-spanner/issues/381)) ([0f1a5de](https://www.github.com/googleapis/python-spanner/commit/0f1a5ded572685a96d29a60c959cb00a48f7a87f))
-   add configurable leader placement support ([#&#8203;399](https://www.github.com/googleapis/python-spanner/issues/399)) ([7f1b120](https://www.github.com/googleapis/python-spanner/commit/7f1b1209e62062014545cf959d41f04184552eec))
-   add sample for low cost instances ([#&#8203;392](https://www.github.com/googleapis/python-spanner/issues/392)) ([3f4f93f](https://www.github.com/googleapis/python-spanner/commit/3f4f93f75f5585a82047bf8d83a24622ad776ecb))

##### Bug Fixes

-   avoid bad version of `opentelemetry-instrumentation` ([#&#8203;429](https://www.github.com/googleapis/python-spanner/issues/429)) ([1620c12](https://www.github.com/googleapis/python-spanner/commit/1620c12a56e0d007cf010690bab303db06d0c914))
-   **deps:** pin 'google-{api,cloud}-core' to allow 2.x versions ([#&#8203;415](https://www.github.com/googleapis/python-spanner/issues/415)) ([b0455d0](https://www.github.com/googleapis/python-spanner/commit/b0455d0ab657cd053a7527e99bdbfadc4de23b30))
-   disable always_use_jwt_access ([c37bf21](https://www.github.com/googleapis/python-spanner/commit/c37bf21afdf417757eff67fe8500aa65f49fd5ad))
-   disable always_use_jwt_access ([#&#8203;395](https://www.github.com/googleapis/python-spanner/issues/395)) ([c37bf21](https://www.github.com/googleapis/python-spanner/commit/c37bf21afdf417757eff67fe8500aa65f49fd5ad))
-   enable self signed jwt for grpc ([#&#8203;427](https://www.github.com/googleapis/python-spanner/issues/427)) ([2487800](https://www.github.com/googleapis/python-spanner/commit/2487800e31842a44dcc37937c325e130c8c926b0))
-   support merging for NUMERIC values ([#&#8203;434](https://www.github.com/googleapis/python-spanner/issues/434)) ([06b4215](https://www.github.com/googleapis/python-spanner/commit/06b4215f76ae806eba1d0d07115c8c90b8c7482d)), closes [#&#8203;433](https://www.github.com/googleapis/python-spanner/issues/433)

##### Documentation

-   fix docstring for session.py ([#&#8203;387](https://www.github.com/googleapis/python-spanner/issues/387)) ([3132587](https://www.github.com/googleapis/python-spanner/commit/3132587453f7bd0be72ebc393626b5c8b1bab982))

</details>

---

### Configuration

📅 **Schedule**: At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Renovate will not automatically rebase this PR, because other commits have been found.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

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Source-Link: googleapis/synthtool@dd05f9d
Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:aea14a583128771ae8aefa364e1652f3c56070168ef31beb203534222d842b8b

* feat: use mutations for executemany() inserts

* add unit test and fix parsing

* add use_mutations flag into Connection class

* use three-values flag for use_mutations

* update docstrings

* use batch DMLs for executemany() method

* prepare args before inserting into SQL statement

* erase mutation mentions

* next step

* next step

* next step

* fixes

* add unit tests for UPDATE and DELETE statements

* don't propagate errors to users on retry

* lint fixes

* use run_in_transaction

* refactor the tests code

* fix merge conflict

* fix the unit test

* revert some changes

* use executemany for test data insert

Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>

* tests: move instance API systests to own module

Refactor to use pytest fixtures / idioms, rather than old 'Config'
setup / teardown.

Toward #472.

* tests: move database API systests to own module

Refactor to use pytest fixtures / idioms, rather than old 'Config'
setup / teardown.

Toward #472.

* tests: move table API systests to own module

Refactor to use pytest fixtures / idioms, rather than old 'Config'
setup / teardown.

Toward #472.

* tests: move backup API systests to own module [WIP]

Refactor to use pytest fixtures / idioms, rather than old 'Config'
setup / teardown.

Toward #472.

* tests: move streaming/chunnking systests to own module

Refactor to use pytest fixtures / idioms, rather than old 'Config'
setup / teardown.

Toward #472.

* tests: move session API systests to own module

Refactor to use pytest fixtures / idioms, rather than old 'Config'
setup/ teardown.

Toward #472.

* tests: move dbapi systests to owwn module

Refactor to use pytest fixtures / idioms, rather than old 'Confog'
setup / teardown.

Toward #472.

* tests: remove legacy systest setup / teardown code

Closes #472.

* tests: don't pre-create datbase before restore attempt

* tests: fix instance config fixtures under emulator

* tests: clean up alt instnce at module scope

Avoids clash with 'test_list_instances' expectatons.

* tests: work around MethodNotImplemented

Raised from 'ListBackups' API on the CI emulator, but not locally.

* chore: drop use of pytz in systests

See #479 for rationale.

* chore: fix fossil in comment

* chore: move '_check_batch_status' to only calling module

Likewise the 'FauxCall' helper class it uses.

* chore: improve testcase name

* tests: replicate dbapi systest changes from #412 into new module

Also, drop use of 'pytz', which is no longer depended on by `google-api-core` / `google-cloud-core`.

Instead, use either `datetime.timezone.utc` or `google.cloud._helpers.UTC`, depending on usage.

Closes #478.

Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>

* fix(samples): batch_update() results processing error

* fix the comment

* minor fix

Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>

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Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>