[UX] VSD Overview panel - adding the top-level namespace to the panel title

Problem to solve:

Software delivery with GitLab is a black-box for the executive. With the heavy investment they made in GitLab, they want to understand what happened so far and what was the platform usage. This becomes more and more important as remote work grows.

Today in the panel, there is no indication about what the top-level namespaces is, which makes it difficult for users to understand the meaning behind the usage metrics:

Proposal

• Adding to the "Usage overview" panel the top-level namespaces (Instance/Top-group) - UX of Option A.
• Adding the group logo/avatar - should be available from the group/project graphql api queries, will need to query for this field

- [ ] Verify that the panel appears only in top-level namespaces, and not in subgroups or subprojects.