Add connected workspaces to agent details

MR: Pending

Description

During IPM discussions it was decided to split off the Connected Workspaces field from the rest of the proposed Agent Details popover in #444859 (closed). This issue is focused on refining the design and implementation details.

JTBD we are targeting:

• When making agent mapping decisions, I want to see the current state of an agent so I can understand the impact my decisions will have on my team's workspace users.

Target UX outcome:

• Users can accurately predict the impact unmapping an agent will have on existing workspaces.

Acceptance Criteria

TODO: Fill out (required)

• We have a clear definition of what qualifies as a connected workspace
• [Describe another requirement needed to complete this issue.]
• [Add additional acceptance criteria as needed.]

Technical Requirements

TODO: Fill out or delete [If applicable, please list out any technical requirements for this feature/enhancement.]

Design Requirements

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