[Utils] Allow update_test_checks to scrub attribute annotations

[jdoerfert]

Summary

Attribute annotations, e.g., #0, are not useful on their own. This
patch adds a flag to update_test_checks to scrub them.

[jdoerfert]

Make the decision per test (in preperation of D69701)

[lebedev.ri]

Now that i believe there's some testing infra for these utils, add/update tests for this?

[jdoerfert]

Add a regression test

[merge_guards_bot]

Unit tests: unknown.

clang-tidy: unknown.

clang-format: unknown.

Build artifacts: diff.json, console-log.txt

[lebedev.ri]

This is opt-in so should be ok.

[arichardson]

Could you also make this change to update_cc_test_checks.py?

This code could move to common and we add a generates_ir flag to common.parse_commandline_args(parser). If that flag is set, parse_commandline_args adds the --function-signature and --scrub-attributes command line option and performs the SCRUB_TRAILING_WHITESPACE_TEST_RE -> SCRUB_TRAILING_WHITESPACE_AND_ATTRIBUTES_RE subsitituion?
If it's in common there should be no need for a separate update_cc_test_checks test (however, it probably makes sense to wait until D71565 has landed to avoid regresssions).

[jdoerfert]

In D68851#1799748, @arichardson wrote:

Could you also make this change to update_cc_test_checks.py?

This code could move to common and we add a generates_ir flag to common.parse_commandline_args(parser). If that flag is set, parse_commandline_args adds the --function-signature and --scrub-attributes command line option and performs the SCRUB_TRAILING_WHITESPACE_TEST_RE -> SCRUB_TRAILING_WHITESPACE_AND_ATTRIBUTES_RE subsitituion?
If it's in common there should be no need for a separate update_cc_test_checks test (however, it probably makes sense to wait until D71565 has landed to avoid regresssions).

I'm in favor of this happening and I can put it on my list. Though, if you want me to do this it will take some time.