Add license scan result polocies to group and sub-group level

What does this MR do and why?

Add license scan result policy to group and sub-group. #386196 (closed)

Note: The feature is already implemented at the project level, we needed to add the feature flag logic at the group/sub-group level.

Screenshots or screen recordings

Before & when flag off	After with flag on

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How to set up and validate locally

• In a rails console enable Feature.enable(:license_scanning_policies)

Group Level

• As a EE user Navigate to http://gdk.test:3000/<group>/-/security/policies
• Click New Policy button
• On the Scan Result Policy card click Select policy
• Add a security scan rule

Sub-Group Level

• As a EE user Navigate to http://gdk.test:3000/<group>/<sub-group>/-/security/policies
• Click New Policy button
• On the Scan Result Policy card click Select policy
• Add a security scan 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 #386196 (closed)