Fix turn relay client fd leak

[honsunrise]

No description provided.

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (361acc4) 61.64% compared to head (2e9b549) 61.53%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
ice/src/agent/agent_gather.rs	50.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #514      +/-   ##
==========================================
- Coverage   61.64%   61.53%   -0.11%     
==========================================
  Files         529      529              
  Lines       48865    48866       +1     
  Branches    12383    12375       -8     
==========================================
- Hits        30122    30071      -51     
- Misses       9575     9593      +18     
- Partials     9168     9202      +34     

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