Add flag for enabling or disabling consistency groups

We want to be disable or enable consistency groups support for testing with drenv.
The enabling/disabling flag can be added in envs files:

ramen:
hub: hub
clusters: [dr1, dr2]
topology: regional-dr
features:
volsync: true
consistency_groups: true

When flag is not present, consistency groups are disabled by default

Signed-off-by: Elena Gershkovich <elenage@il.ibm.com>

test/drenv/test.py

@@ -144,13 +144,17 @@ def enable_dr():
 
     cluster = lookup_cluster()
     placement_name = placement.split("/")[1]
+    consistency_groups = env["features"].get("consistency_groups", False)
+    cg_enabled = "true" if consistency_groups else "false"
 
     drpc = f"""
 apiVersion: ramendr.openshift.io/v1alpha1
 kind: DRPlacementControl
 metadata:
   name: {config['name']}-drpc
   namespace: {config['namespace']}
+  annotations:
+    drplacementcontrol.ramendr.openshift.io/is-cg-enabled: '{cg_enabled}'
   labels:
     app: {config['name']}
 spec: