ci: 🤖 Update test matrix with new releases (10/02) (#4880)

Update our test matrix with new releases of integrated frameworks and
libraries.

## How it works
- Scan PyPI for all supported releases of all frameworks we have a
dedicated test suite for.
- Pick a representative sample of releases to run our test suite
against. We always test the latest and oldest supported version.
- Update
[tox.ini](https://github.com/getsentry/sentry-python/blob/master/tox.ini)
with the new releases.

## Action required
- If CI passes on this PR, it's safe to approve and merge. It means our
integrations can handle new versions of frameworks that got pulled in.
- If CI doesn't pass on this PR, this points to an incompatibility of
either our integration or our test setup with a new version of a
framework.
- Check what the failures look like and either fix them, or update the
[test
config](https://github.com/getsentry/sentry-python/blob/master/scripts/populate_tox/config.py)
and rerun
[scripts/generate-test-files.sh](https://github.com/getsentry/sentry-python/blob/master/scripts/generate-test-files.sh).
See
[scripts/populate_tox/README.md](https://github.com/getsentry/sentry-python/blob/master/scripts/populate_tox/README.md)
for what configuration options are available.

 _____________________

_🤖 This PR was automatically created using [a GitHub
action](https://github.com/getsentry/sentry-python/blob/master/.github/workflows/update-tox.yml)._

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]