[E2E] PROMOTE TO BLOCKING: restrict_push_protected_branch_spec.rb

What does this MR do?

Promotes the following e2e tests to the blocking bucket:

1. Create Restricted protected branch push and merge when only one group is allowed to merge and push to a protected branch behaves like user without push access fails to push | Testcase | Spec metrics

2. Create Restricted protected branch push and merge when a sub-group has push access, a developer in the parent group does not have push access behaves like user without push access fails to push | Testcase | Spec metrics

This MR was created based on data from reliable e2e test report: #465155 (closed)

(This MR was automatically generated by gitlab_quality-test_tooling at 2024-06-03 02:04:44 UTC)