This adds a test to provide coverage for the issue to be resolved in:
https://gitlab.com/gitlab-org/gitlab/-/issues/216345

- Includes changes to `Resource::ProtectedBranch` to require code
  owner approval for a branch that's already protected.
- Adds a page object for merge request approvals settings.
- Enables `find_element` to handle any kwargs without a conflict
  between dynamic element selectors and capybara (which only accepts
  certain keywords).
- Enables `has_element?` to find disabled elements.
- Enables `Runtime::Feature` to verify when disabling a feature flag.

Testcase creation issue:
https://gitlab.com/gitlab-org/quality/testcases/-/issues/803