Remove request_ctx Fixture

[threeal]

This pull request removed the request_ctx fixture since it has been marked deprecated for a long time and currently it is not supported on the Flask v3.0.0.

For a side note, inlining the import won't work since it could still break the test if using Flask v3.0.0.

• Fixes Flask v3.0.0 breaks pytest-flask import of _request_ctx_stack #167.

Checklist:

• Add tests that demonstrate the correct behavior of the change. Tests should fail without the change.
• Add or update relevant docs, in the docs folder and in code.
• Add an entry in docs/CHANGELOG.rst, summarizing the change and linking to the issue.
• Run pre-commit hooks and fix any issues.
• Run pytest and make sure no tests failed.

[jonyscathe]

Is there anything stopping this from being merged now and a release being made?
Would love to move some projects to flask==3, but need this change through first if I don't want to rewrite a whole lot of tests.

[EvanBldy]

I'm interested in a new release with that too :)

[nicoddemus]

I'm improving/fixing CI in #169, after that gets merged I think we can merge this one as well.

[RonnyPfannschmidt]

My understanding is that the internal api used there is intentionally made gone

Is there another way we can safely enter the request context?

[RonnyPfannschmidt]

Nm, I wasn't in the full picture

[nicoddemus]

Thanks a lot @threeal and sorry for the delay.

I will prepare a new release shortly.

[nicoddemus]

1.3.0 has been released. 🎉