Make add / remove labeled return working for hierarchical blocks

Related to KT-20439

idea/testData/intentions/addLabeledReturnInLambda/multipleBlocks.kt

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+// INTENTION_TEXT: "Add return@find"
+
+fun foo() {
+    listOf(1,2,3).find {
+        if (it > 0) {
+            <caret>true
+        } else {
+            false
+        }
+    }
+}

idea/testData/intentions/addLabeledReturnInLambda/multipleBlocks.kt.after

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+// INTENTION_TEXT: "Add return@find"
+
+fun foo() {
+    listOf(1,2,3).find {
+        if (it > 0) {
+            return@find true
+        } else {
+            false
+        }
+    }
+}

idea/testData/intentions/removeLabeledReturnInLambda/multipleBlocks.kt

@@ -0,0 +1,11 @@
+// WITH_RUNTIME
+
+fun foo() {
+    listOf(1,2,3).find {
+        if (it > 0) {
+            return@find <caret>true
+        } else {
+            false
+        }
+    }
+}

idea/testData/intentions/removeLabeledReturnInLambda/multipleBlocks.kt.after

@@ -0,0 +1,11 @@
+// WITH_RUNTIME
+
+fun foo() {
+    listOf(1,2,3).find {
+        if (it > 0) {
+            true
+        } else {
+            false
+        }
+    }
+}