Improve alert component on the user page in admin dashboard

[gtsiolis]

Problem to solve

The alert component added in #8632, feels like the UX is broken or something is misaligned or missing on the layout. Cc @laushinka @geropl

Proposal

Let's improve how the alert component on the user page in admin dashboard.

Designs

TBD (To be discussed)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[gtsiolis]

Reopening as this is still relevant, and marking as a good first issue.

Using the new info alert component above the workspaces list sounds like a good minimal viable change.