Refactor declarative policies for Remote Development and Workspaces

Issue: Refactor declarative policies for Remote Develo... (#431514 - closed)

What does this MR do and why?

See detailed description in Refactor declarative policies for Remote Develo... (#431514 - closed)

See overview of Category:Remote Development Workspaces Admin UI issues and MRs in MVP of Admin UI for Workspaces (&11992 - closed)

Screenshots or screen recordings

N/A, only contains policy changes, no UI changes.

How to set up and validate locally

• Review all unit and integration tests of policy contexts
• Exploratory test behavior by creating/updating Cluster Agents and associated Workspaces

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.