Removed deprecated 'publish' workflow

[kpumuk]

The workflow to publish Python library to pypi was introduced 4 years ago, and uses 2 actions via submodules. Since then we got another workflow, pypi.yml, which does the same.

Neither worked with 0.23.0 release:

• https://github.com/apache/thrift/actions/workflows/publish.yml
• https://github.com/apache/thrift/actions/workflows/pypi.yml — failed with unapproved action, but I fixed it since then by pinning the approved version

I believe one is enough, and pypi.yml seem to have worked for 0.22.0 release, so let's keep this one.

• Did you create an Apache Jira ticket? (Request account here, not required for trivial changes)
• If a ticket exists: Does your pull request title follow the pattern "THRIFT-NNNN: describe my issue"?
• Did you squash your changes to a single commit? (not required, but preferred)
• Did you do your best to avoid breaking changes? If one was needed, did you label the Jira ticket with "Breaking-Change"?
• If your change does not involve any code, include [skip ci] anywhere in the commit message to free up build resources.