backport of commit 8931e4790b46df81cca615865e1f33a127276e1d (#20972)

Co-authored-by: akshya96 <87045294+akshya96@users.noreply.github.com>

changelog/20964.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+identity: Fixes duplicate groups creation with the same name but unique IDs. 
+```

vault/identity_store_groups.go

@@ -69,8 +69,11 @@ func groupPaths(i *IdentityStore) []*framework.Path {
 			},
 
 			Fields: groupPathFields(),
-			Callbacks: map[logical.Operation]framework.OperationFunc{
-				logical.UpdateOperation: i.pathGroupRegister(),
+			Operations: map[logical.Operation]framework.OperationHandler{
+				logical.UpdateOperation: &framework.PathOperation{
+					Callback:                  i.pathGroupRegister(),
+					ForwardPerformanceStandby: true,
+				},
 			},
 
 			HelpSynopsis:    strings.TrimSpace(groupHelp["register"][0]),