Change Signature: Support conversion between extension and non-extension functions

idea/testData/refactoring/changeSignature/ConvertReceiverToParameter2After.kt

@@ -0,0 +1,14 @@
+fun <caret>foo(s: String, x: X, k: Int): Boolean {
+    return x.k + s.length() - k > 0
+}
+
+class X(val k: Int)
+
+fun <T, R> with(receiver: T, f: T.() -> R): R = receiver.f()
+
+fun test() {
+    foo("1", X(0), 2)
+    with(X(0)) {
+        foo("1", this, 2)
+    }
+}