Address run length of Secure test files
As per this discussion on an MR: gitlab-org/gitlab!20479 (comment 248837474)
qa/specs/features/ee/browser_ui/secure/create_merge_request_with_secure_spec.rb
is taking quite a long time to run due to long setup that is not shared between tests. Attempts to share this setup uncovered that some state that can affect test validations is stored within the project.
Maybe a better approach would be to split this into multiple files to allow them to run in parallel?