gh-143572: Run 'python3-libraries' fuzzer in CI using CIFuzz

[sethmlarson]

Created a list of files and directories that should trigger a re-run of the python3-libraries fuzzers. Now that the Python repository is the home for this fuzzer it should be easier for Python core developers to fix issues with the fuzzer in case there are issues.

• Issue: Begin running CIFuzz on standard library modules #143572

[hugovk]

I think we could also rename most of the "library"/"libraries"/"LIBRARY" to "stdlib"/"STDLIB" and it'd be clearer this is running on the standard library and not any third-party library code.

[sethmlarson]

I think we could also rename most of the "library"/"libraries"/"LIBRARY" to "stdlib"/"STDLIB" and it'd be clearer this is running on the standard library and not any third-party library code.

I agree with this, we can change most of our uses to "stdlib" within this PR except for oss-fuzz-project-name. I can handle that in a separate PR since we'll have to wait for OSS-Fuzz maintainers to rename the project.

[sethmlarson]

Thanks @StanFromIreland and @hugovk for the reviews! I've moved to a reusable workflows approach. I'll try pushing a commit modifying one of the libraries to check that the workflow fires correctly.

[picnixz]

There is also Modules/pyexpat.c that could be worth I guess?