Introduce Variable: Do not compare explicit receivers using ReceiverValue

#KT-5319 Fixed

idea/testData/refactoring/introduceVariable/TwoExplicitReceivers.kt

@@ -0,0 +1,12 @@
+class Bar {
+}
+
+class Foo() {
+    fun Bar.invoke(): Int = 1
+}
+
+fun main(args: Array<String>) {
+    val f = Foo()
+    println(<selection>Bar().f()</selection>)
+    println(Bar().f())
+}