Use updated MR widget for sec spec

What does this MR do and why?

Describe in detail what your merge request does and why.

Updates QA selectors when refactor_license_compliance_extension feature flag enabled to allow ./qa/specs/features/ee/browser_ui/13_secure/merge_request_license_widget_spec.rb to pass

As per issue #370336 (closed)

Screenshots or screen recordings

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How to set up and validate locally

Run against FF disabled

qa % 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 --disable-feature refactor_license_compliance_extension

And enabled

qa % 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 --enable-feature refactor_license_compliance_extension

Numbered steps to set up and validate the change are strongly suggested.

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.