replace UploadErrorEnum with shared.upload.constants.UploadErrorCode

[matt-codecov]

as title

• issue make upload error reporting more consistent engineering-team#1520
• worker PR add catchall exception handling to build_report_from_raw_content() worker#703
• gazebo PR add new UploadErrorEnum values gazebo#3193

i fixed some plumbing around error handling in upload processing. everything that used to be "unknown" will still be "unknown" for now but now there's a catchall for any exceptions we have not already assigned an error code. we can watch logs for exceptions we have not already made an error code for

[github-actions]

This PR includes changes to shared. Please review them here: codecov/shared@d4ceb0e...d26f241

[codecov-notifications]

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All modified and coverable lines are covered by tests ✅

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.23%. Comparing base (e72e553) to head (a3d1650).

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@             Coverage Diff             @@
##               main       #820   +/-   ##
===========================================
  Coverage   96.23000   96.23000           
===========================================
  Files           812        812           
  Lines         18550      18548    -2     
===========================================
- Hits          17851      17849    -2     
  Misses          699        699           

Flag	Coverage Δ
unit	92.45% <100.00%> (-0.01%)	⬇️
unit-latest-uploader	92.45% <100.00%> (-0.01%)	⬇️

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[Swatinem]

lgtm, though we should have another look at breaking changes in the graphql api.