Revert "feat(helm)!: Update chart snapshot-controller to 4.0.0 (#3102)"

This reverts commit e951f86.

Author: kashalls

kubernetes/fran/apps/volsync-system/snapshot-controller/app/helmrelease.yaml

@@ -9,7 +9,7 @@ spec:
   chart:
     spec:
       chart: snapshot-controller
-      version: 4.0.0
+      version: 3.0.6
       sourceRef:
         kind: HelmRepository
         name: piraeus