[E2E] PROMOTE TO BLOCKING: push_options_mwps_spec.rb

What does this MR do?

Promotes the following e2e tests to the blocking bucket:

1. Create Merge request push options sets merge when pipeline succeeds | Testcase | Spec metrics

This MR was created based on data from reliable e2e test report: #451727 (closed)

(This MR was automatically generated by gitlab_quality-test_tooling at 2024-03-25 02:04:41 UTC)