Part 1 - Introduce V2 policy rule builder

What does this MR do and why?

This is Part 1 of 3 of breaking up the original MR !103744 (closed)

In this MR:

• policy_rule_builder_v2.vue minimal file, includes initial selection dropdown only
• V2 YML config entries and feature flag toggle logic for configs
• Scan result policy editor feature flag toggle between the original and v2 of policy_rule_builder.vue
• Updated translation file

Screenshots or screen recordings

Before & when flag off	After with flag on

How to set up and validate locally

• 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
• On the Scan Result Policy card click Select policy
• Add a rule

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 #371506 (closed)