community/ceph: Fix wrong mount helper location
This fixes #10351
The mount.ceph is in the wrong location, /usr/sbin/ instead of /sbin. It is therefore never called resulting in a libceph: bad option at 'secretfile=...' error.
We are currently working on getting Alpine Linux 3.21 out. This means that merge requests that are not aimed to help with that (only affecting testing, new aports) have a lower priority at the moment. Please be patient, they will be eventually picked up.
This fixes #10351
The mount.ceph is in the wrong location, /usr/sbin/ instead of /sbin. It is therefore never called resulting in a libceph: bad option at 'secretfile=...' error.