Enable Rosetta AOT caching

[culpen90]

Summary

• Add RosettaConfiguration to choose default, custom Unix socket, abstract socket, or uncached Rosetta modes.
• Enable the default Unix-socket Rosetta translation cache whenever Rosetta is enabled.
• Create the guest cache socket parent directory before registering the Rosetta emulator.

Fixes #89

Validation

• swift format lint --strict --configuration .swift-format-nolint Sources/Containerization/ContainerManager.swift Sources/Containerization/RosettaConfiguration.swift Sources/Containerization/VZVirtualMachineInstance.swift Sources/Containerization/VZVirtualMachineManager.swift Sources/Containerization/Vminitd+Rosetta.swift Tests/ContainerizationTests/RosettaConfigurationTests.swift
• swift build
• swift test --filter RosettaConfigurationTests