Support Python 3.12

[sdrave]

This PR adds official support for Python 3.12 and updates ci-current and conda CI environments to this version.

[github-actions]

This pull request modifies pyproject.toml or requirements-ci-oldest-pins.in.
In case dependencies were changed, make sure to call

make ci_requirements

and commit the changed files to ensure that CI runs with the updated dependencies.

[sdrave]

@ftschindler, there are no dune-xt/dune-gdt wheels for 3.12. Is there a timeline?

[sdrave]

@ftschindler, there are no dune-xt/dune-gdt wheels for 3.12. Is there a timeline?

@ftschindler, any updates?

[ftschindler]

@ftschindler, there are no dune-xt/dune-gdt wheels for 3.12. Is there a timeline?

@ftschindler, any updates?

Did not see that ping a month ago, sry. Will look into it ...

[sdrave]

@ftschindler, there are no dune-xt/dune-gdt wheels for 3.12. Is there a timeline?

@ftschindler, any updates?

Did not see that ping a month ago, sry. Will look into it ...

@ftschindler, what's the status? As soft freeze is approaching, I'll have to merge this soonish.

[ftschindler]

@ftschindler, there are no dune-xt/dune-gdt wheels for 3.12. Is there a timeline?

@ftschindler, any updates?

Did not see that ping a month ago, sry. Will look into it ...

@ftschindler, what's the status? As soft freeze is approaching, I'll have to merge this soonish.

I'm looking into it, can give you more info in a day or two. What's the time frame I have?

[sdrave]

@ftschindler, I'd say this should be merged in about two weeks.

[ftschindler]

@ftschindler, I'd say this should be merged in about two weeks.

thx for the note. Making some progress, let's see :/

[github-actions]

This pull request modifies pyproject.toml or requirements-ci-oldest-pins.in.
In case dependencies were changed, make sure to call

make ci_requirements

and commit the changed files to ensure that CI runs with the updated dependencies.