Use global function to compare any entity to both stores (#89282)

* WIP implement generic compare interface

* Use global compare fn for all entities

* Lint

* Update pkg/apiserver/rest/dualwriter.go

Co-authored-by: Dan Cech <dcech@grafana.com>

* Don't need to hash, just compare bytes

* Fix tests

---------

Co-authored-by: Dan Cech <dcech@grafana.com>

pkg/registry/apis/scope/storage.go

@@ -207,9 +207,3 @@ func SelectableScopeNodeFields(obj *scope.ScopeNode) fields.Set {
 		"spec.parentName": parentName,
 	})
 }
-
-// Compare asserts on the equality of objects returned from both stores	(object storage and legacy storage)
-func (s *storage) Compare(storageObj, legacyObj runtime.Object) bool {
-	//TODO: define the comparison logic between a scope returned by the storage and a scope returned by the legacy storage
-	return false
-}