Show deleted runs in the UI

[r4victor]

Viewing deleted runs is useful for auditing and debugging, especially for global admins. Currently, if a run is deleted or overridden, it's not returned by the /api/runs/list endpoint and, thus, not shown in the UI. The API should return such runs, and the UI should show them with status Deleted as regular runs with their final status (deleted runs always have final statuses). So basically, the UI should not differentiate between deleted and non-deleted runs, and the Delete button can be also removed.

To support viewing deleted runs details, the UI should be able to get a deleted run. Currently, it's not possible because the /get endpoint returns only active runs. The /get endpoint can be changed to accepts a run id. In this case, the UI can include a run id in the routes (e.g. projects/my-project/runs/slimy-rabbit-1?id=0d0f42c5-a242-4b35-aa0e-862ef21d7b28).

For other resources, the UI doesn't show detailed pages, but their /get endpoints can be adjusted in a similar manner.

Implementation plan:

1. (The server) Support getting deleted runs by run id.
2. (The UI) Support viewing deleted runs details (route runs by id). The old name-based routing can remain for non-deleted runs.
3. (The server) Include deleted runs in /api/runs/list.
4. (The UI) Remove the Delete button.

[peterschmidt85]

See #2157 (comment)

I get if I run a new CLI with an old server:

Server validation error: 
{'detail': [{'loc': ['body', 'id'],
             'msg': 'extra fields not permitted',
             'type': 'value_error.extra'}]}