Handle python/Python dir/file in toolchain archive

[fishcakez]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature (please, look at the "Scope of the project" section in the README.md file)
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

For python 3.8.10 on macos there is a Python directory in the python static archive. This conflicts with the symlink added in #782. Note that bazel "incorrectly" caches the repository tests so they may not run if the test code itself didn't change even if the repository rules do.

Issue Number: N/A

What is the new behavior?

Delete python directory/file before creating a symlink and tests pass.

Does this PR introduce a breaking change?

• Yes
• No

Other information

We should look to ensure that repository integration tests aren't incorrectly cached for the toolchain in CI.

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[fishcakez]

Will fix the CLA issue next week.
buildkite is failing because require the fix of #803. Note the bug wasn't caught by CI because of #806.

[f0rmiga]

Sorry, I missed this PR. It ended up getting fixed here 2cdad9e as I extracted the fix from the bigger change I was doing in 26526a5.