After upgrading from Ceph 5.3 to Ceph 7 (18.2.0-192.el9cp), we encountered multiple issues on the Ceph Dashboard, particularly with the "Capacity" section not displaying and resulting in error 500 - internal server errors.

### Error Details:
With dashboard debug enabled, the following error is seen in the logs when the system accesses the /api/osd/settings endpoint:

Traceback (most recent call last):
  File "/usr/share/ceph/mgr/dashboard/controllers/osd.py", line 173, in settings
    'nearfull_ratio': results['nearfull_ratio'],
TypeError: string indices must be integers

This error suggests that the 'results' variable, which should be a dictionary, is being treated as a string, leading to a TypeError when trying to access 'nearfull_ratio'.

### Environment Details:
- **Ceph Version:** 7.0 (18.2.0-192.el9cp)
- **Dashboard:** Ceph Dashboard included in the above Ceph version
- **Environment:** Live production environment
- **Test Environment:** Not affected; test environment with the same upgrade procedure works correctly

### Steps to Reproduce:
1. Upgrade from Ceph 5.3 to Ceph 7 (18.2.0-192.el9cp)
2. Access the Ceph Dashboard
3. Navigate to the "Capacity" section or trigger the /api/osd/settings endpoint
4. Observe error 500 and TypeError in logs

### Impact:
The Ceph Dashboard's "Capacity" section does not display, and the inability to access OSD settings via the dashboard API impairs the monitoring and configuration capabilities in a live production environment.

### Upstream Reference:
This issue appears to be related to an upstream bug tracked here: https://tracker.ceph.com/issues/62089
The upstream bug suggests that the issue arises due to the results variable being treated as a string instead of a dictionary.