LastImportTime for resource. (#112153)

* LastImportTime for resource.

* Make StorageBackendImpl implement GetResourceLastImportTimes

* More missing implementations of GetResourceLastImportTimes

* Fix import.

* Skip TestGetResourceLastImportTime in TestBadgerKVStorageBackend.

* Implement GetResourceLastImportTimes by mockStorageBackend

* Bump test tolerance.

* Fix postgres query and timezone.

* Fix postgres query and timezone.

* Make linter happy.

pkg/registry/apis/dashboard/legacy/storage.go

@@ -242,6 +242,12 @@ func (a *dashboardSqlAccess) ListModifiedSince(ctx context.Context, key resource
 	}
 }
 
+func (a *dashboardSqlAccess) GetResourceLastImportTimes(ctx context.Context) iter.Seq2[resource.ResourceLastImportTime, error] {
+	return func(yield func(resource.ResourceLastImportTime, error) bool) {
+		yield(resource.ResourceLastImportTime{}, errors.New("not implemented"))
+	}
+}
+
 // List implements StorageBackend.
 func (a *dashboardSqlAccess) ListIterator(ctx context.Context, req *resourcepb.ListRequest, cb func(resource.ListIterator) error) (int64, error) {
 	if req.ResourceVersion != 0 {

pkg/registry/apis/iam/noopstorage/storage_backend.go

@@ -61,3 +61,9 @@ func (c *StorageBackendImpl) WatchWriteEvents(ctx context.Context) (<-chan *reso
 func (c *StorageBackendImpl) WriteEvent(context.Context, resource.WriteEvent) (int64, error) {
 	return 0, errNoopStorage
 }
+
+func (c *StorageBackendImpl) GetResourceLastImportTimes(ctx context.Context) iter.Seq2[resource.ResourceLastImportTime, error] {
+	return func(yield func(resource.ResourceLastImportTime, error) bool) {
+		yield(resource.ResourceLastImportTime{}, errNoopStorage)
+	}
+}

pkg/registry/apis/iam/resourcepermission/storage_backend.go

@@ -13,6 +13,7 @@ import (
 	"k8s.io/apiserver/pkg/endpoints/request"
 
 	"github.com/grafana/authlib/types"
+
 	"github.com/grafana/grafana/apps/iam/pkg/apis/iam/v0alpha1"
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/registry/apis/iam/common"
@@ -295,3 +296,9 @@ func (s *ResourcePermSqlBackend) WriteEvent(ctx context.Context, event resource.
 
 	return rv, err
 }
+
+func (s *ResourcePermSqlBackend) GetResourceLastImportTimes(ctx context.Context) iter.Seq2[resource.ResourceLastImportTime, error] {
+	return func(yield func(resource.ResourceLastImportTime, error) bool) {
+		yield(resource.ResourceLastImportTime{}, errNotImplemented)
+	}
+}