Extract Function: Allow to extract local variables which are used outside of extracted fragment

idea/testData/refactoring/extractFunction/controlFlow/initializer/valueUsedInLambda.kt

@@ -0,0 +1,9 @@
+// SIBLING:
+fun main(args: Array<String>) {
+    <selection>val a = 1</selection>
+    lambda {
+        a
+    }
+}
+
+fun lambda(f: () -> Unit) {}