cephadm: add osd_type to orchestrator

cephadm: add osd_type to orchestrator

This commit enables us to deploy both classic and crimson
type OSDs using cephadm. To enable the same, a new feature,
osd_type is added to DriverGroupSpec. The default value for
the same is classic, but can also be set to crimson.
When this value is read by cephadm, the entrypoint is
changed from /usr/bin/ceph-osd to /usr/bin/ceph-osd-crimson.

Fixes: https://tracker.ceph.com/issues/74081
Signed-off-by: Shraddha Agrawal <shraddha.agrawal000@gmail.com>