feat(action): add option to disable setup python cache

[felix11h]

These changes allow our merge-checks action to use action-setup-python-poetry, see moneymeets/action-merge-checks#31.

Caching in setup-python needs to be disabled for merge-checks, as we run into the issue described here, actions/setup-python#361, when we use github.action_path as the working directory.

Test:

• ci.yml in moneymeets-pulumi https://github.com/moneymeets/moneymeets-pulumi/actions/runs/6654196980/job/18081746536

[zyv]

I find it all a bit annoying (solution and naming), but it's the best we can do for now, I'm afraid.

Maybe you could put a TODO next to the switch to remove it when the ticket in the action is closed? Thanks!

[felix11h]

Maybe you could put a TODO next to the switch to remove it when the ticket in the action is closed? Thanks!

I have added the comments. I am merging this now, if you still have feedback later, we can make another pull request.

[felix11h]

/rebase