Bug 1798051: Reinstate v1alpha2 operatorgroup

The v1alpha2 version of the operatorgroup crd in the 4.4 OpenShift
release was not properly deprecated. Adding back that version to
the crd spc.

https://bugzilla.redhat.com/show_bug.cgi?id=1798051

Author: awgreene

deploy/chart/templates/0000_50_olm_10-operatorgroup.crd.yaml

@@ -9,6 +9,9 @@ spec:
   - name: v1
     served: true
     storage: true
+  - name: v1alpha2
+    served: true
+    storage: false
   names:
     plural: operatorgroups
     singular: operatorgroup

manifests/0000_50_olm_10-operatorgroup.crd.yaml

@@ -9,6 +9,9 @@ spec:
   - name: v1
     served: true
     storage: true
+  - name: v1alpha2
+    served: true
+    storage: false
   names:
     plural: operatorgroups
     singular: operatorgroup