Support Django 5.0

[sentrivana]

Make sure we're ready once Django 5.0 comes out in December. (Most likely start of December: https://code.djangoproject.com/wiki/Version5.0Roadmap)

Check against the latest beta/release candidate: https://pypi.org/project/Django/#history

Known Issues

• sentry_sdk.init throws an exception on Django 5.0a1 #2383

Support Checklist

• Fix known issues: feat(integrations): Support Django 5.0 #2490
• Test the SDK manually and fix any issues found
• Read the changelog
• Add Django 5.0 to tox.ini: feat(integrations): Support Django 5.0 #2490
• Update docs: feat(python): Prepare for Django 5.0 support sentry-docs#8481