Resolve callable reference expressions

#KT-1183 In Progress

compiler/testData/diagnostics/tests/callableReference/differentPackageClass.kt

@@ -0,0 +1,25 @@
+// FILE: a.kt
+
+package first
+
+class A {
+    fun foo() {}
+    fun bar(<!UNUSED_PARAMETER!>x<!>: Int) {}
+    fun baz() = "OK"
+}
+
+// FILE: b.kt
+
+package other
+
+import first.A
+
+fun main() {
+    val x = first.A::foo
+    val y = first.A::bar
+    val z = A::baz
+
+    x : KMemberFunction0<A, Unit>
+    y : KMemberFunction1<A, Int, Unit>
+    z : KMemberFunction0<A, String>
+}