Flag in space settings to allow Alkemio Support to act as admin

[SimoneZaza]

Description

As an admin, I want to be able to get help from the Alkemio support team, but I don't want them to have access without my explicit approval. As a support team member, I want that admins from spaces I can access have given explicit approval that I can edit their Space.

Acceptance criteria

• [ ] In Space Settings > Settings, in the Member Actions (after #6200 named Allowed Actions) block, add switch with the following text at the bottom, below the switch from #6200: Alkemio Support Allow the Alkemio Support team to act as an admin in this Space.

Space settings already has this flag via the main PR for the epic, so this is client only.

Additional Context

Areas that will be affected

To be added during the refinement