Extract Function: Support extraction of "it" parameter from lambdas

idea/testData/refactoring/extractFunction/parameters/it/outerIt.kt

@@ -0,0 +1,9 @@
+// PARAM_TYPES: kotlin.Array<kotlin.Int>
+fun <T> Array<T>.check(f: (T) -> Boolean): Boolean = false
+
+// SIBLING:
+fun foo(t: Array<Array<Int>>) {
+    if (t.check { <selection>it.check{ it + 1 > 1 }</selection> }) {
+        println("OK")
+    }
+}