Update yaml file from policy scope

What does this MR do and why?

This MR partially resolves #428494 (closed)

Policy scope component updates yaml file and set UI state from parsed yaml

Changes in yaml are also reflected in UI

Screenshots or screen recordings

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

Description	UI
new policy frameworks	new frameworks.mov
new policy projects	projects.mov
Existing policy	existing.mov

How to set up and validate locally

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

1. Enable Feature Flag

   Feature.enable(:security_policies_policy_scope)  

2. Go to a Group -> Secure -> Policies -> New policy -> New scan result/execution policy -> check Policy scope section is there.

3. Go to Project -> Secure -> Policies -> New policy -> New scan result/execution policy -> check Policy scope section is not there.

4. Try to select different options in policy scope section and save policy

5. Try editing saved policy

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 #428494 (closed)