Upload-artifact error in xmodule-with-lms/xmodule-with-cms tests in CI

[robrap]

The error reported is:

Error: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

• This is similar to a past report, in a different place, where re-running failed tests fixes the issue.
  • See Upload-artifact error in edx-platform unit tests CI #34985
• We started seeing this as early as December 2024 (possibly earlier).
• Here is a link to a recent failure (2024-01-23).
  • Failure on xmodule-with-lms.
• Here is a link to an older failure with fewer details left (2024-01-16).
  • Failure on xmodule-with-cms.

Additional sample output:

Run actions/upload-artifact@v4
  with:
    name: pytest-warnings-json-xmodule-with-lms
    path: test_root/log/pytest_warnings*.json
  
    overwrite: true
    if-no-files-found: warn
    compression-level: 6
    include-hidden-files: false
  env:
    pythonLocation: /opt/hostedtoolcache/Python/3.11.11/x64
    PKG_CONFIG_PATH: /opt/hostedtoolcache/Python/3.11.11/x64/lib/pkgconfig
    Python_ROOT_DIR: /opt/hostedtoolcache/Python/3.11.11/x64
    Python2_ROOT_DIR: /opt/hostedtoolcache/Python/3.11.11/x64
    Python3_ROOT_DIR: /opt/hostedtoolcache/Python/3.11.11/x64
    LD_LIBRARY_PATH: /opt/hostedtoolcache/Python/3.11.11/x64/lib
    settings_path: lms.envs.test
    unit_test_paths: xmodule/
With the provided path, there will be 1 file uploaded
Artifact name is valid!
Root directory input is valid!
Error: Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

[robrap]

Also noting that a contributor was confused and didn't know to re-run failed tests. Hopefully we can correct this issue, but not sure whether it would help to have guidance around this somewhere.