Make canceling a completed JAWS job a noop

[MrCreosote]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 18.75000% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 54.15%. Comparing base (8f02437) to head (1a6e7da).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
cdmtaskservice/jaws/client.py	18.75%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #493      +/-   ##
==========================================
- Coverage   54.23%   54.15%   -0.09%     
==========================================
  Files          68       68              
  Lines        5596     5608      +12     
==========================================
+ Hits         3035     3037       +2     
- Misses       2561     2571      +10     

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