Visually signal collaborators with account icons

Future design proposed by @samsadasivan in #6652:

> We can add in the small admin photos created by zitadel to the cards themselves for forms or services with multiple team members

Start by reading the design discussion in issue #6652 and locating the existing cards for forms or services with multiple team members; no file or test is named here. Review how collaborator account photos are represented in the supplied design. Done means the relevant cards visibly show collaborator account icons as proposed.

Written by the indexing model from the issue text.