fix(wsgi): WSGI integrations respect SCRIPT_NAME env variable

[sarvaSanjay]

URLs generated using Sentry's WSGI Middleware should include SCRIPT_NAME in the event's url

Fixes https://github.com/getsentry/sentry-python/issues/2576

Noticed that the problem described in the above issue wasn't specific to Django per se but general to all WSGI applications which is why I have made modifications to the SentryWsgiMiddleware class that should resolve this issue for Django and other integrations as well. As far as I can tell this problem should not arise for ASGI applications as the root_path is accounted for.

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[sarvaSanjay]

Hey, its my first contribution. It seems as if we need to add a label to this PR for any of the checks to execute, could any of the collaborators add the same?

[szokeasaurusrex]

Hey, its my first contribution. It seems as if we need to add a label to this PR for any of the checks to execute, could any of the collaborators add the same?

I have approved most of the tests to run. For now, the AWS permissions check will still fail – we will add the necessary label once we have reviewed and approved the change

[szokeasaurusrex]

Also, please address the linter and test failures (except the AWS Lambda tests – you can ignore these for now); we can only merge the changes once all these tests pass

[codecov[bot]]

Codecov Report

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

Project coverage is 79.27%. Comparing base (c210ad6) to head (6f07450).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2622      +/-   ##
==========================================
- Coverage   79.33%   79.27%   -0.06%     
==========================================
  Files         132      132              
  Lines       14218    14218              
  Branches     2985     2985              
==========================================
- Hits        11280    11272       -8     
- Misses       2093     2106      +13     
+ Partials      845      840       -5     

Files	Coverage Δ
sentry_sdk/integrations/wsgi.py	83.21% <ø> (ø)

... and 4 files with indirect coverage changes