Equality comparison for bound callable references takes into account bound receiver.

Fixed KT-14939: use expected receiver type when generating receiver code in get/set methods for bound property references.
Otherwise we have VerifyError for bound receiver 'null' of type 'Nothing?', which is mapped to 'java.lang.Void'.

TODO: proper equality comparison for property accessors ('x::prop.getter', 'x::prop.setter').

compiler/testData/codegen/bytecodeListing/noReceiverInCallableReferenceClasses.kt

@@ -0,0 +1,9 @@
+class A {
+    fun foo() {}
+    val bar = 42
+}
+
+val aFoo = A()::foo
+val aBar = A()::bar
+val A_foo = A::foo
+val A_bar = A::bar