Adding rep:policy to allow forms-users read access in conf/__appId__

[mayankjindalmj]

Description

https://jira.corp.adobe.com/browse/FORMS-15890

Related Issue

Motivation and Context

This change allows any user who is a part of forms-users group to have read access to editable templates folders under conf directory.

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[pankaj-parashar]

We need to include this configuration only when forms is enabled for archetype project creation.