Codegen for callable reference expressions

#KT-1183 In Progress

compiler/testData/codegen/box/callableReference/nestedConstructorFromClass.kt

@@ -0,0 +1,14 @@
+class A {
+    class Nested {
+        val o = 111
+        val k = 222
+    }
+    
+    fun result() = (::Nested)().o + (A::Nested)().k
+}
+
+fun box(): String {
+    val result = A().result()
+    if (result != 333) return "Fail $result"
+    return "OK"
+}