systemd: remove `ProtectClock=true` for `ceph-osd@.service`

systemd: remove `ProtectClock=true` for `ceph-osd@.service`

Ceph 16.2.0 Pacific by https://github.com/ceph/ceph/commit/9a84d5a introduce following new systemd restriction:

    ProtectClock=true
    ProtectHostname=true
    ProtectKernelLogs=true
    RestrictSUIDSGID=true

BTW, `ceph-osd@.service` failed with `ProtectClock=true` unexpectly, also see:

  - <https://lists.ceph.io/hyperkitty/list/ceph-users@ceph.io/thread/TNBGGNN6STGDKARAQTQCIPTU4KLIVJQV/>
  - <https://serverfault.com/questions/1059317/bluestore-var-lib-ceph-osd-ceph-2-block-read-bdev-label-failed-to-open-var-l>

This PR intruduce:

  - Remove `ProtectClock=true` for our systemd service templates

Fixes: https://tracker.ceph.com/issues/50347
Signed-off-by: Wong Hoi Sing Edison <hswong3i@pantarei-design.com>