[E2E] PROMOTE TO BLOCKING: merge_with_code_owner_in_root_group_spec.rb

What does this MR do?

Promotes the following e2e tests to the blocking bucket:

1. Create Codeowners when the project is in the root group and the code owner is the root group behaves like code owner merge request is approved and merged | Testcase | Spec metrics

2. Create Codeowners when the project is in the root group and the code owner is a user behaves like code owner merge request is approved and merged | Testcase | Spec metrics

This MR was created based on data from reliable e2e test report: #462605 (closed)

(This MR was automatically generated by gitlab_quality-test_tooling at 2024-05-20 02:05:24 UTC)