fix: Constrain types of ai_track decorator

[alexander-alderman-webb]

The following code snippet now fails mypy: #4663 (comment)

I followed how other functions in the SDK are typed. For example, other wrappers have the signature (F) -> F for a type variable F, although here the function can be async as well.

Closes #4663

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.85%. Comparing base (4456351) to head (27c5c53).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4745      +/-   ##
==========================================
- Coverage   84.88%   84.85%   -0.03%     
==========================================
  Files         156      156              
  Lines       16115    16115              
  Branches     2741     2741              
==========================================
- Hits        13679    13675       -4     
- Misses       1650     1652       +2     
- Partials      786      788       +2     

Files with missing lines	Coverage Δ
sentry_sdk/ai/monitoring.py	85.33% <100.00%> (ø)

... and 2 files with indirect coverage changes

[sentrivana]

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