Merge Request test report widget shows failing tests when the MR pipeline is green

Encountered this in !90347 (merged).

Some quick investigations:

1. The pipeline did not have any failing jobs: https://gitlab.com/api/v4/projects/gitlab-org%2Fgitlab/pipelines/565639209/jobs?scope[]=failed
2. The MR pipelines did not have any failure on rspec unit pg12, so it seems to eliminate caching issues or report being fetched from an older pipeline.

Other potential problems:

1. Could it be that rspec-retry retried flaky tests which eventually passed, but the failures are still recorded in the Junit report and it is picked up by the parser?

Other observations:

1. https://gitlab.com/gitlab-org/gitlab/-/pipelines/565639209/test_report looking at this test report and the failures, they show the same test failures coming from different test files, which is strange.