Description of problem:

Customer is getting 500 errors on the latest release when accessing the Ceph Dashboard. 
Errata https://access.redhat.com/errata/RHBA-2023:7780 fixes the exact same error 
in BZ 2238470 https://bugzilla.redhat.com/show_bug.cgi?id=2238470

```
Internal Server Error
Traceback (most recent call last):
  File "/usr/share/ceph/mgr/dashboard/services/exception.py", line 47, in dashboard_exception_handler
    return handler(*args, **kwargs)
  File "/lib/python3.9/site-packages/cherrypy/_cpdispatch.py", line 54, in __call__
    return self.callable(*self.args, **self.kwargs)
  File "/usr/share/ceph/mgr/dashboard/controllers/_base_controller.py", line 263, in inner
    ret = func(*args, **kwargs)
  File "/usr/share/ceph/mgr/dashboard/controllers/_rest_controller.py", line 193, in wrapper
    return func(*vpath, **params)
  File "/usr/share/ceph/mgr/dashboard/controllers/rgw.py", line 153, in list
    'port': int(re.findall(r'port=(\d+)', metadata['frontend_config#0'])[0])
IndexError: list index out of range
[::ffff:10.160.104.12:52722] [GET] [500] [0.032s] [admin] [513.0B] /api/rgw/daemon
[b'{"status": "500 Internal Server Error", "detail": "The server encountered an unexpected condition which prevented it from fulfilling the request.", "request_id": "472de92d-3ed5-4a2c-8e51-2c65306a1107"} 
```

Version-Release number of selected component (if applicable):
```
{
    "mon": {
        "ceph version 18.2.1-229.el9cp (ef652b206f2487adfc86613646a4cac946f6b4e0) reef (stable)": 5
    },
    "mgr": {
        "ceph version 18.2.1-229.el9cp (ef652b206f2487adfc86613646a4cac946f6b4e0) reef (stable)": 4
    },
    "osd": {
        "ceph version 18.2.1-229.el9cp (ef652b206f2487adfc86613646a4cac946f6b4e0) reef (stable)": 24
    },
    "mds": {
        "ceph version 18.2.1-229.el9cp (ef652b206f2487adfc86613646a4cac946f6b4e0) reef (stable)": 12
    },
    "rgw": {
        "ceph version 18.2.1-229.el9cp (ef652b206f2487adfc86613646a4cac946f6b4e0) reef (stable)": 15
    },
    "overall": {
        "ceph version 18.2.1-229.el9cp (ef652b206f2487adfc86613646a4cac946f6b4e0) reef (stable)": 60
    }
}
```
Expected results: No 500 errors