ceph-osd: set container objectstore env variables

ceph-osd: set container objectstore env variables

Because we need to manage legacy ceph-disk based OSD with ceph-volume
then we need a way to know the osd_objectstore in the container.
This was done like this previously with ceph-disk so we should also
do it with ceph-volume.
Note that this won't have any impact for ceph-volume lvm based OSD.

Rename docker_env_args fact to container_env_args and move the container
condition on the include_tasks call.
Remove OSD_DMCRYPT env variable from the ceph-osd template because it's
now included in the container_env_args variable.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1792122
Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>