Fix ClassLoader leak of ActivityCorrelator ThreadLocal

[lilgreenbird]

address issue reported in #2136 where ActivityCorrelator ThreadLocal never being removed from the thread.

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 50.15%. Comparing base (8e92248) to head (892ef1a).
Report is 2 commits behind head on main.

❗ Current head 892ef1a differs from pull request most recent head e6b3e5f. Consider uploading reports for the commit e6b3e5f to get more accurate results

Files	Patch %	Lines
.../microsoft/sqlserver/jdbc/SQLServerConnection.java	60.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2366      +/-   ##
============================================
+ Coverage     50.10%   50.15%   +0.04%     
- Complexity     3813     3823      +10     
============================================
  Files           145      145              
  Lines         33286    33299      +13     
  Branches       5639     5641       +2     
============================================
+ Hits          16677    16700      +23     
- Misses        14221    14240      +19     
+ Partials       2388     2359      -29     

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