mgr/dashboard: mgr/dashboard: Select no device by default in EC profile

mgr/dashboard: mgr/dashboard: Select no device by default in EC profile

Fixes https://tracker.ceph.com/issues/67853

When EC pools are created with device class specified, the pools are created with just 1 PG and autoscaler does not work.
PG autoscaler not working on a cluster where pools have multiple overlapping roots is a known issue, and bug is raised for same :>

Issue documented already : https://docs.ceph.com/en/reef/rados/operations/placement-groups/#viewing-pg-scaling-recommendations

Also renames "let ceph decide" option to "All devices" in crush rule and ec profile component.
Updates unit tests for ec profile modal
Signed-off-by: Afreen Misbah <afreen23.git@gmail.com>