Add support for Managed Database user access control for Redis

[christhemorse]

Description

This PR adds support for user access control for Redis Managed Database subscriptions. The updates include new list/get user response properties for Redis engine types as well as a new /access-control PUT request within the users to update the ACL configuration values.

Checklist:

• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you linted your code locally prior to submission?
• Have you successfully ran tests with your changes locally?

[optik-aper]

Tested and working