fix(helm): empty resource annos/labels result in no service annos/labels

Signed-off-by: Ilya Lesikov <ilya@lesikov.com>

pkg/deploy/helm/extra_annotations_and_labels_post_renderer.go

@@ -227,6 +227,11 @@ func appendExtraData(node *yaml_v3.Node, key string, data interface{}) error {
 		} else {
 			appendToNode(targetNode, data)
 		}
+
+		if targetNode.Kind != yaml_v3.AliasNode && targetNode.Kind != yaml_v3.MappingNode {
+			targetNode.Kind = yaml_v3.MappingNode
+		}
+		targetNode.Tag = "!!map"
 	} else {
 		appendToNode(node, map[string]interface{}{key: data})
 	}

pkg/deploy/helm/extra_annotations_and_labels_post_renderer_test.go

@@ -232,6 +232,34 @@ spec:
 `, werf.Version, werf.Version),
 			}),
 
+		Entry("should add builtin and extra annotations and labels into resources manifest with empty annotations and labels",
+			ExtraAnnotationsAndLabelsPostRendererTestData{
+				PostRenderer: NewExtraAnnotationsAndLabelsPostRenderer(
+					map[string]string{"test-annotation-1": "value-1", "test-annotation-2": "value-2"},
+					map[string]string{"test-label-1": "value-1", "test-label-2": "value-2"},
+					false,
+				),
+				Manifest: `apiVersion: v1
+kind: ConfigMap
+metadata:
+  labels:
+  annotations:
+  name: test
+`,
+				ExpectedManifest: fmt.Sprintf(`apiVersion: v1
+kind: ConfigMap
+metadata:
+  labels:
+    test-label-1: value-1
+    test-label-2: value-2
+  annotations:
+    test-annotation-1: value-1
+    test-annotation-2: value-2
+    werf.io/version: %s
+  name: test
+`, werf.Version),
+			}),
+
 		Entry("should add extra annotations into yaml alias node defined by yaml anchor",
 			ExtraAnnotationsAndLabelsPostRendererTestData{
 				PostRenderer: NewExtraAnnotationsAndLabelsPostRenderer(