Users who are allowed to push to protected branches can't create a protected branch via command line

Summary

Introduced when this feature was implemented: https://gitlab.com/gitlab-org/gitlab-ce/issues/53361.

As of this writing, the implementation will only allow users who can merge to create protected branches via web and API only.

Users who are allowed to push to a protected branch can't create a protected branch via command line. They should still be allowed. Related to https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24969#note_152711220.

Steps to reproduce

1. Create a protected branch wildcard (e.g. release-*).
2. Allow Developers to push.
3. As a Developer, push a new branch matching the wildcard.
4. The push will be rejected.

Example Project

https://gitlab.com/patrickbajao/test-project

What is the current bug behavior?

User who are allowed to push to protected branch can't create a protected branch via CLI.

What is the expected correct behavior?

User who are allowed to push to protected branch should be able create a protected branch via CLI.

Output of checks

This bug happens on GitLab.com

Possible fixes

Gitlab::Checks::BranchCheck#protected_branch_creation_checks should be skipped if user is allowed to push to branch.