feat(wsgi): Gate client IP/user info behind data_collection config

[ericapisani]

Apply data_collection.user_info filtering to WSGI handling, mirroring the
ASGI change: gate REMOTE_ADDR capture, client.address/user.ip_address span
attributes, and event user.ip_address behind data_collection, falling back
to send_default_pii when data_collection is not configured.

Also skip installing the default EventScrubber when a data_collection
config is provided, since scrubbing could remove data that config allows,
and warn when an event scrubber is explicitly configured alongside it.

Add parametrized end-to-end tests for WSGI, Django, and Flask covering
data_collection precedence over send_default_pii.

Ref PY-2586
Ref #6746

[linear-code]

PY-2586

[github-actions]

Codecov Results 📊

✅ 94900 passed | ⏭️ 6338 skipped | Total: 101238 | Pass Rate: 93.74% | Execution Time: 334m 33s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📈 +2737
Passed Tests	📈 +2703
Failed Tests	—
Skipped Tests	📈 +34

All tests are passing successfully.

✅ Patch coverage is 92.00%. Project has 2508 uncovered lines.
❌ Project coverage is 89.65%. Comparing base (base) to head (head).

Files with missing lines (1)

File	Patch %	Lines
sentry_sdk/client.py	50.00%	⚠️ 2 Missing and 1 partials

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
- Coverage    89.70%    89.65%    -0.05%
==========================================
  Files          193       193         —
  Lines        24030     24242      +212
  Branches      8348      8528      +180
==========================================
+ Hits         21555     21734      +179
- Misses        2475      2508       +33
- Partials      1384      1394       +10

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