dashboard: add missing parameter in `ceph_cmd`
the `ceph_cmd` fact is missing the `--net=host` parameter.
Some tasks consuming this fact can fail like following:
```
Error: error configuring network namespace for container
b8ec913db1fb694ae683faf202680de7a59c714a004e533aba87e8503d29261f: Missing CNI default network
```
Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1931365
Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit
f143b1a6478bffe0e7ff1c23810d0a5368cf3592)