Merge Request License Approver

What does this MR do and why?

Tests the test gap from the Demo of Secure functionality in which we can have approvers for License compliance

See #393196 (closed)

Screenshots or screen recordings

UI changes are addition of selectors

How to set up and validate locally

Run the following from qa directory

CHROME_HEADLESS=false bundle exec bin/qa Test::Instance::All http://gdk.test:3000/ ./qa/specs/features/ee/browser_ui/13_secure/merge_request_license_widget_spec.rb:182

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.