Change the supervision/projection endpoints

**Motivation**
So far, this endpoint only return projections running on the current node while we would also want to know what run on other nodes

**Acceptance criteria**
1. All running projections are returned
2. Node information is returned with each projection

**Not in scope**
1. Filtering/pagination

Start by locating the supervision/projection endpoint implementation and tracing how it currently lists projections on the current node. Verify the endpoint can return all running projections with node information, while leaving filtering and pagination out of scope; confirm the behavior with the endpoint's existing tests if available.

Written by the indexing model from the issue text.