Fix non-deterministic S3 test failure.

[aemous]

Description of changes:

• Replace a hard-coded part number with mock.ANY to prevent non-deterministic test failures.

Description of tests:

• Ran the updates test locally and observed it passes.

Relevant links:

• v2 PR

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.08%. Comparing base (52985a2) to head (f216d4a).
Report is 72 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #9069      +/-   ##
==========================================
- Coverage     0.08%   0.08%   -0.01%     
==========================================
  Files          210     210              
  Lines        16952   16955       +3     
==========================================
  Hits            14      14              
- Misses       16938   16941       +3     

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