zfs-share.service executes `zfs share` on every boot to share any
filesystem/s, that are shared over SMB and/or NFS using the
sharesmb and sharenfs properties.
Since we do not rely on these properties to share over SMB and NFS
and the service fails on boot on TrueNAS if sharesmb and/or
sharenfs properties are set, and we rely on middleware to control
the SMB and NFS shares, zfs-share.service should be disabled for
TrueNAS SCALE.
Signed-off-by: Umer Saleem <usaleem@ixsystems.com>