Unquarantine protected branch tests

What does this MR do?

This MR unquarantines the tests in restrict_push_protected_branch_spec.rb We are unquarantining this test for two reasons.

1. Because of !22525 (merged) has not been merged yet, we cannot run this test in quarantine and we need to run the test to determine if it is still flaky, and if it is we can then examine the artifacts. We have been unable so far to reproduce this issue locally.
2. Because we want to know if Sanad's changes have fixed this test d58847b7

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team