feat(integrations): Support Django 5.1

[sentrivana]

• test Django test suite against 5.1b1
• fix any issues that come up, like this one:

AttributeError: <module 'django.urls.resolvers' from '/home/runner/work/sentry-python/sentry-python/.tox/py3.10-django-v5.1/lib/python3.10/site-packages/django/urls/resolvers.py'> does not have the attribute 'get_converter'

Closes https://github.com/getsentry/sentry-python/issues/3208

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 79.46%. Comparing base (c76168c) to head (d6b567f).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3207   +/-   ##
=======================================
  Coverage   79.46%   79.46%           
=======================================
  Files         133      133           
  Lines       14290    14290           
  Branches     3004     3004           
=======================================
  Hits        11355    11355           
  Misses       2089     2089           
  Partials      846      846           

see 2 files with indirect coverage changes

[cclauss]

https://github.com/getsentry/sentry-python/blob/407f651f66fa811a20241579aa7881de624b3e20/tests/integrations/django/test_transactions.py#L98

Something like:

@pytest.mark.skipif(
    django.VERSION >= (5, 1)
    reason="django.urls.converters.get_converter() function was removed in Django v5.1",
)

https://docs.djangoproject.com/en/dev/releases/5.1/#miscellaneous

The undocumented django.urls.converters.get_converter() function is removed.

[sentrivana]

Thanks @cclauss, I'm now skipping the old test for 5.1 and I've added another for 5.1+ that uses get_converters instead. If anyone's interested, here is the Django change that prompted this.

So the test suite is passing now, I'll do some manual testing as well and then we should be good to go.