Moving local fun callee generation to CallReceiver

compiler/testData/codegen/box/functions/localFunctions/kt4514.kt

@@ -0,0 +1,9 @@
+fun box(): String {
+    fun String.f() = this
+    val vf: String.() -> String = { this }
+
+    val localExt = "O".f() + "K"?.f()
+    if (localExt != "OK") return "localExt $localExt"
+
+    return "O".vf() + "K"?.vf()
+}

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"
+}

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

@@ -0,0 +1,21 @@
+open class T(var value: Int) {}
+
+fun localExtensionOnNullableParameter(): T {
+
+    fun T.local(s: Int) {
+        value += s
+    }
+
+    var t: T? = T(1)
+    t?.local(2)
+
+    return t!!
+}
+
+
+fun box(): String {
+    val result = localExtensionOnNullableParameter().value
+    if (result != 3) return "fail 2: $result"
+
+    return "OK"
+}