Update policy setting default value

What does this MR do and why?

Update policy setting default value

• the default value for the require password for approval settings has been updated from true to false as per the epic description

Changelog: changed

EE: true

Screenshots or screen recordings

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

Scenrio	Before	After
setting
yaml

How to set up and validate locally

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

1. Upload a GitLab Ultimate license
2. Navigate to a project => Secure => Policies => New policy => Scan Result Policy => Select "Any merge request" type
3. Verify that the Require password for approval setting is defaulted to false

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 #418765 (closed)