chore: enable python-crc32c kokoro presubmits

[ohmayr]

enable python-crc32c kokoro presubmits

Fixes: #16512

[gemini-code-assist]

Code Review

This pull request updates the Kokoro presubmit configuration for Linux by changing the build script from bypass.sh to build.sh. The review feedback suggests restoring the explanatory comments and vertical spacing that were removed during the update to maintain readability and configuration clarity, along with adding a trailing newline to the file.

[gemini-code-assist]

The removal of explanatory comments and vertical spacing reduces the maintainability of the configuration. It is recommended to retain comments that explain the purpose of specific settings (like the artifact regex workaround for Kokoro 404s) and to use blank lines to separate top-level configuration blocks for better readability. Additionally, adding a newline at the end of the file is a standard practice.

Suggested change

	action {
	define_artifacts {
	regex: "**/*sponge_log.xml"
	}
	}
	# Bypass the trampoline entirely and run our dummy script natively
	build_file: "google-cloud-python/packages/google-crc32c/scripts/bypass.sh"
	\ No newline at end of file
	build_file: "google-cloud-python/packages/google-crc32c/scripts/build.sh"
	# Tell Kokoro where to find the test logs so it doesn't 404
	action {
	define_artifacts {
	regex: "**/*sponge_log.xml"
	}
	}
	# Run the build script natively
	build_file: "google-cloud-python/packages/google-crc32c/scripts/build.sh"

[avijitsahaaornoy]

bypasse

[avijitsahaaornoy]

fyi