fix: Enable pre-commit CI workflow on pull requests

[ulgens]

Enables precommit_checks CI workflow on pull requests, so PRs with issues will be automatically detected during review process.

Relates to

• [Bug] pre-commit workflow is broken #7823

[ulgens]

I updated the detail but I'm not allowed to rerun the pipeline. Even though that step succeeds, I expect another failure from the actual pre-commit step.

[okhat]

Thanks so much @ulgens ! Should I merge this now? Or do you want to follow up with a different PR first?

[ulgens]

@okhat I'd like to apply fixes with several different PRs if that's okay. I don't really want to push a PR with 338 changed files.

[okhat]

Yes that sounds good to me. But what's your plan? Should we merge this now or wait for other followups?

[ulgens]

Let's merge this one.

[okhat]

And then?

[ulgens]

Then, I'm planning to create PRs like these

• pre-commit-hooks #7827
• Isort #7828

for each hook repos under pre-commit, and finally enable everything, optimize the pre-commit workflow and make it faster.