Moving local fun callee generation to CallReceiver

compiler/testData/codegen/box/functions/localFunctions/kt4784.kt

@@ -0,0 +1,20 @@
+open class T(var value: Int) {}
+
+fun plusAssign(): T {
+
+    fun T.plusAssign(s: Int) {
+        value += s
+    }
+
+    var t  = T(1)
+    t += 1
+
+    return t
+}
+
+fun box(): String {
+    val result = plusAssign().value
+    if (result != 2) return "fail 1: $result"
+
+    return "OK"
+}