Support Kolla Ceph to deploy blustore OSDs with Kolla-ansible.

Please refer to [1] for bluestore OSD configuration

The patch includes:
1. Set Ceph OSD store type group_vars/all.yml. The default value
is "bluestore" in Rocky.

2. Make Kolla Ceph to deploy bluestore OSDs with Kolla-ansible

3. Update gate test configuration for Ceph bluestore OSD test

[1]: specs/kolla-ceph-bluestore.rst

Partially-Implements: blueprint kolla-ceph-bluestore
Depends-On: I00eaa600a5e9ad4c1ebca2eeb523bca3d7a25128
Change-Id: I14f20a00654dff32c36d078ebb9005d91a3e60b2
Signed-off-by: Tone Zhang <tone.zhang@arm.com>