allowing ASGI to use drf_request in DjangoRequestExtractor

[PakawiNz]

since we already have patched a request object (both ASGI/WSGI) before arriving, we should move patched-using logic closer to where it actually being used. for minimize impact and allow ASGI functionality.

---

Thank you for contributing to sentry-python! Please add tests to validate your changes, and lint your code using tox -e linters.

Running the test suite on your PR might require maintainer approval. The AWS Lambda tests additionally require a maintainer to add a special label, and they will fail until this label is added.

[sentrivana]

Thank you @PakawiNz! Makes sense to me.

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 84.30%. Comparing base (4636afc) to head (fdc0500).
Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
sentry_sdk/integrations/django/__init__.py	87.50%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3572      +/-   ##
==========================================
- Coverage   84.32%   84.30%   -0.02%     
==========================================
  Files         133      133              
  Lines       13906    13908       +2     
  Branches     2933     2933              
==========================================
- Hits        11726    11725       -1     
- Misses       1441     1449       +8     
+ Partials      739      734       -5     

Files with missing lines	Coverage Δ
sentry_sdk/integrations/django/__init__.py	84.16% <87.50%> (+0.08%)	⬆️

... and 6 files with indirect coverage changes