Implement codegen for bound class reference expressions

- Inline the usage of ExpressionCodegen#generateClassLiteralReference into
  ClosureCodegen, simplify
- Support DoubleColonLHS.Expression in generateClassLiteralReference
- Substantially simplify KClass.java intrinsic by reusing
  generateClassLiteralReference

 #KT-13075 Fixed
 #KT-12995 In Progress

compiler/testData/codegen/box/classLiteral/bound/javaIntrinsicWithSideEffect.kt

@@ -0,0 +1,10 @@
+// WITH_RUNTIME
+
+fun box(): String {
+    var x = 42
+    val k = (x++)::class.java
+    if (k != Int::class.java) return "Fail 1: $k"
+    if (x != 43) return "Fail 2: $x (side effect should have taken place)"
+
+    return "OK"
+}