Consider using pyupgrade to notify for old idioms

I notice during code reviews that a lot of the PRs use old python syntax that are not required any more, or even better idioms that we have already cleaned out from the codebase before. Some of these slip through, which is not ideal.

Using tools like https://github.com/asottile/pyupgrade e.g. in CI or as a pre-commit hook could resolve this issue.

Start by reviewing the repository's current CI and pre-commit configuration, then assess how pyupgrade could report old Python syntax or idioms during code review. Done means the selected integration is configured, produces useful notifications, and does not introduce unwanted failures for existing code.

Written by the indexing model from the issue text.