Resolve callable reference expressions

#KT-1183 In Progress

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

@@ -0,0 +1,9 @@
+class A<T>(val t: T) {
+    fun foo(): T = t
+}
+
+fun bar() {
+    val x = A<String>::foo
+
+    x : KMemberFunction0<A<String>, String>
+}