[v9]: Remove enableTracing

[buenaflor]

📜 Description

Removes deprecated enableTracing option

💡 Motivation and Context

Part of #2411

💚 How did you test it?

Unit tests

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPii is enabled
• I updated the docs if needed
• All tests passing
• No breaking changes

🔮 Next steps

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.29%. Comparing base (7a0aa9a) to head (4f841f1).
Report is 2 commits behind head on v9.

Additional details and impacted files

@@            Coverage Diff             @@
##               v9    #2695      +/-   ##
==========================================
- Coverage   88.32%   88.29%   -0.03%     
==========================================
  Files         262      262              
  Lines        8913     8911       -2     
==========================================
- Hits         7872     7868       -4     
- Misses       1041     1043       +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.