[PROMOTE TO BLOCKING] Create Codeowners merge request assigns code owner

What does this MR do?

Promotes the test Create Codeowners merge request assigns code owners as approvers to the blocking bucket

This test was identified in the reliable e2e test report: #450639 (closed)

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(This MR was automatically generated by gitlab_quality-test_tooling at 2024-03-18 02:05:48 UTC)