Add license scan result policy card copy behind flag

What does this MR do and why?

It changes the left card description behind a feature flag as part of #371505 (closed)

Before	After

Verification Steps

• In a rails console enable Feature.enable(:license_scanning_policies)
• As a EE user Navigate to http://gdk.test:3000/<group>/<project>/-/security/policies
• Click New Policy button
• Observe the text description copy

Describe in detail what your merge request does and why.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

How to set up and validate locally

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.

Related to #371505 (closed)