Add usage info in RSE page

[lobis]

Description

RSE usage info, such as the info returned by rucio rse show is useful to have in the RSE page.

┌────────┬───────────┬───────┬───────┬───────────┬─────────────────────┐
│ SOURCE │      USED │ FILES │  FREE │     TOTAL │ UPDATED AT          │
├────────┼───────────┼───────┼───────┼───────────┼─────────────────────┤
│ rucio  │ 52.494 MB │  3583 │ 0.0 B │ 52.494 MB │ 2025-03-13 13:27:42 │
└────────┴───────────┴───────┴───────┴───────────┴─────────────────────┘

Motivation

No response

Change

No response

Additional Information

• The Rucio API needs to be changed.