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/sideEffect.kt

@@ -0,0 +1,14 @@
+fun box(): String {
+    var x = 42
+
+    val k1 = (x++)::class
+    if (k1 != Int::class) return "Fail 1: $k1"
+    if (x != 43) return "Fail 2: $x"
+
+    val k2 = { x *= 2; x }()::class
+    // Note that k2 is the class of the wrapper type java.lang.Integer
+    if (k2 != Integer::class) return "Fail 3: $k2"
+    if (x != 86) return "Fail 4: $x"
+
+    return "OK"
+}