fix: try calling set_code_owner inside task

[rgraber]

TL;DR - Replaces set_code_owner_attribute decorator with a manual call to set_code_owner_attribute_from_module because the decorator isn't working for some reason

Developer Checklist

• Reviewed the release process
• Translations and JS/SASS compiled
• Bumped version number in openassessment/__init__.py and package.json

Testing Instructions

[ How should a reviewer test this PR? ]

Reviewer Checklist

Collectively, these should be completed by reviewers of this PR:

• I've done a visual code review
• I've tested the new functionality

FYI: @openedx/content-aurora

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (a2f652a) 94.93% compared to head (0f985e3) 94.91%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2084      +/-   ##
==========================================
- Coverage   94.93%   94.91%   -0.03%     
==========================================
  Files         183      183              
  Lines       18634    18636       +2     
  Branches     1704     1704              
==========================================
- Hits        17690    17688       -2     
- Misses        712      716       +4     
  Partials      232      232              

Flag	Coverage Δ
unittests	94.91% <63.63%> (-0.03%)	⬇️

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Files	Coverage Δ
openassessment/__init__.py	100.00% <100.00%> (ø)
openassessment/xblock/test/test_submission.py	100.00% <100.00%> (ø)
openassessment/workflow/tasks.py	45.45% <20.00%> (-18.19%)	⬇️

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[timmc-edx]

This seems to have worked: edx/edx-arch-experiments#482