Support class reference expressions without kotlin-reflect.jar in classpath

Currently not much you can do with them, but in the future '.java' extension
property will allow to get the Class instance from it.

Also introduce codegen tests with stdlib but without reflection in the
classpath.

Based on the work by @dnpetrov

compiler/testData/codegen/boxWithStdlib/reflection/noKotlinReflect/simpleClassLiterals.kt

@@ -0,0 +1,14 @@
+// NO_KOTLIN_REFLECT
+
+import kotlin.test.assertNotNull
+
+class Klass
+
+fun box(): String {
+    assertNotNull(Int::class)
+    assertNotNull(String::class)
+    assertNotNull(Klass::class)
+    assertNotNull(Error::class)
+
+    return "OK"
+}