Flask v3.0.0 breaks `pytest-flask` import of `_request_ctx_stack`

[slint]

Describe the bug

Flask v3.0.0, released Sep 30th, removed _request_ctx_stack, used in fixtures.py

To Reproduce

1. Install pytest-flask
2. Run your tests
3. See import error

:warning: Import error stacktrace :warning:

``` Traceback (most recent call last): File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/runpy.py", line 197, in _run_module_as_main return _run_code(code, main_globals, None, File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/runpy.py", line 87, in _run_code exec(code, run_globals) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/pytest/__main__.py", line 5, in raise SystemExit(pytest.console_main()) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/_pytest/config/__init__.py", line 187, in console_main code = main() File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/_pytest/config/__init__.py", line 145, in main config = _prepareconfig(args, plugins) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/_pytest/config/__init__.py", line 324, in _prepareconfig config = pluginmanager.hook.pytest_cmdline_parse( File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/pluggy/_hooks.py", line 493, in __call__ return self._hookexec(self.name, self._hookimpls, kwargs, firstresult) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/pluggy/_manager.py", line [11](https://github.com/zenodo/zenodo-rdm/actions/runs/6382674986/job/17321782664#step:8:12)5, in _hookexec return self._inner_hookexec(hook_name, methods, kwargs, firstresult) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/pluggy/_callers.py", line 130, in _multicall teardown[0].send(outcome) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/_pytest/helpconfig.py", line 102, in pytest_cmdline_parse config: Config = outcome.get_result() File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/pluggy/_result.py", line 114, in get_result raise exc.with_traceback(exc.__traceback__) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/pluggy/_callers.py", line 77, in _multicall res = hook_impl.function(*args) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/_pytest/config/__init__.py", line 1017, in pytest_cmdline_parse self.parse(args) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/_pytest/config/__init__.py", line 1305, in parse self._preparse(args, addopts=addopts) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/_pytest/config/__init__.py", line 1188, in _preparse self.pluginmanager.load_setuptools_entrypoints("pytest11") File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/pluggy/_manager.py", line 398, in load_setuptools_entrypoints plugin = ep.load() File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/importlib/metadata.py", line 86, in load module = import_module(match.group('module')) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/importlib/__init__.py", line [12](https://github.com/zenodo/zenodo-rdm/actions/runs/6382674986/job/17321782664#step:8:13)7, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "", line 1030, in _gcd_import File "", line 1007, in _find_and_load File "", line 986, in _find_and_load_unlocked File "", line 680, in _load_unlocked File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/_pytest/assertion/rewrite.py", line 168, in exec_module exec(co, module.__dict__) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/pytest_invenio/plugin.py", line 25, in from .fixtures import ( File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/_pytest/assertion/rewrite.py", line 168, in exec_module exec(co, module.__dict__) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/pytest_invenio/fixtures.py", line 22, in from pytest_flask.plugin import _make_test_response_class File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/_pytest/assertion/rewrite.py", line 168, in exec_module exec(co, module.__dict__) File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/pytest_flask/plugin.py", line [14](https://github.com/zenodo/zenodo-rdm/actions/runs/6382674986/job/17321782664#step:8:15), in from .fixtures import accept_any File "/opt/hostedtoolcache/Python/3.9.18/x64/lib/python3.9/site-packages/_pytest/assertion/rewrite.py", line [16](https://github.com/zenodo/zenodo-rdm/actions/runs/6382674986/job/17321782664#step:8:17)8, in exec_module exec(co, module.__dict__) File "/opt/hostedtoolcache/Python/3.9.[18](https://github.com/zenodo/zenodo-rdm/actions/runs/6382674986/job/17321782664#step:8:19)/x64/lib/python3.9/site-packages/pytest_flask/fixtures.py", line 6, in from flask import _request_ctx_stack ImportError: cannot import name '_request_ctx_stack' from 'flask' (/opt/hostedtoolcache/Python/3.9.18/x[64](https://github.com/zenodo/zenodo-rdm/actions/runs/6382674986/job/17321782664#step:8:65)/lib/python3.9/site-packages/flask/__init__.py) ```

Environment (please complete the following information):

• OS: any
• Python Version 3.9
• pytest-flask version 1.2.0

Additional context

It looks like there's a deprecation warning already for using the fixture, so a possible path for a fix would be to:

1. (Optional) "inline" the import inside the fixture function (to avoid affecting people still using the fixture with Flask <3.0.0, and give them a chance to respond to the deprecation warning).
2. Remove the fixture completely and release pytest-flask v2.0.0

[jonyscathe]

The request_ctx text fixture has had a deprecation warning on it for about two years. Should that just be removed at which point request_ctx_stack is no longer needed?

[nicoddemus]

168 is open to address this.