udp: fix leaks on EP destroy

[gdamore]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 79.35%. Comparing base (d59de52) to head (a8618b8).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/sp/transport/udp/udp.c	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1887      +/-   ##
==========================================
+ Coverage   79.24%   79.35%   +0.10%     
==========================================
  Files          95       95              
  Lines       22288    22293       +5     
  Branches     3382     3382              
==========================================
+ Hits        17662    17690      +28     
+ Misses       4551     4528      -23     
  Partials       75       75              

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