Parameter <-> Receiver Conversion: Support header/impl declarations

#KT-18907 Fixed

idea/testData/multiModuleQuickFix/memberFunReceiverToParameterByImpl/header/header.kt

@@ -0,0 +1,7 @@
+header class Foo {
+    fun String.foo(n: Int)
+}
+
+fun Foo.test() {
+    "1".foo(2)
+}

idea/testData/multiModuleQuickFix/memberFunReceiverToParameterByImpl/header/header.kt.after

@@ -0,0 +1,7 @@
+header class Foo {
+    fun foo(s: String, n: Int)
+}
+
+fun Foo.test() {
+    foo("1", 2)
+}