Schemas in repository-policies need a review

## What are the schemas that are affected by the issue
https://github.com/adobe/xdm/tree/master/schemas/content/repository-policies

## What are examples of products that are impacted by the issue
Anything on the content services platform

The use of xdm as the namespace for everything there isn't correct.

Review the schemas under schemas/content/repository-policies and determine which definitions use the xdm namespace. Confirm the intended namespace with the repository context or maintainers; done requires an agreed correction covering all affected schemas, but the issue does not specify the replacement.

Written by the indexing model from the issue text.