Follow-up on openai release issues

[lmolkova]

• Doc link on pypi is 404 - https://opentelemetry-python-contrib.readthedocs.io/en/latest/instrumentation/openai/openai.html - OpenAI instrumentation docs fixes #2988
• Per-package release: publish to pypi instead of testpypi #2987
• Fix patch package-release process that needs versions in branch to match ones in core repo on main - see Openai release branch: cherry-pick #2961 and core-version update from main #2974 for the details

[aabmass]

The "Homepage" link on PyPI is also broken

[lmolkova]

thanks @aabmass! I'm fixing it in the #2988

[xrmx]

@lmolkova Has this been fixed?

[lmolkova]

I still need to follow up on this part

Fix patch package-release process that needs versions in branch to match ones in core repo on main - see #2974 for the details