[controller] Implement rvr-status-config-peers-controller

[astef]

Specs

Expected Outcome

• PR to the branch astef-prototype, linked to the current issue
• put code here: images/controller/internal/controllers/rvr_status_config_peers
• see [controller] Implement rvr-diskful-count-controller #333 for all important extension points

Quality Bar

• full compliance to specs is required
• code is covered with unit-tests, including all important positive and negative use cases
• stick to the existing code style
• code is not expected to be manually tested in cluster at this stage