Add validation for --benchmark-samples to prevent crash with zero value

[qerased]

This PR adds validation for --benchmark-samples=0 to prevent a crash,
adds an automated self-test, and updates approval baselines.

PR is based on the request #3041
Fixes #3040

[codecov]

Codecov Report

❌ Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 91.03%. Comparing base (9709163) to head (8575d33).

Additional details and impacted files

@@            Coverage Diff             @@
##            devel    #3056      +/-   ##
==========================================
- Coverage   91.03%   91.03%   -0.00%     
==========================================
  Files         202      202              
  Lines        8727     8736       +9     
==========================================
+ Hits         7944     7952       +8     
- Misses        783      784       +1     

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[qerased]

also added test for "could not parse ... as benchmark samples" return

[horenmar]

Thanks

also added test for "could not parse ... as benchmark samples" return

👍