[Tests] Migrate backend-independent tests from native to compiler/testData.

^KT-65979

compiler/testData/codegen/box/kclass/kClassEnumArgument.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+// WITH_STDLIB
+// WITH_REFLECT
+
+import kotlin.test.*
+import kotlin.reflect.KClass
+
+enum class E(val arg: KClass<*>?) {
+    A(null as KClass<*>?),
+    B(String::class);
+}
+
+fun box(): String {
+    assertEquals("String", E.B.arg?.simpleName)
+
+    return "OK"
+}

compiler/testData/codegen/box/kclass/kclass1.jvm_abi.txt

@@ -0,0 +1,9 @@
+MODULE main
+	CLASS codegen/kclass/kclass1/Kclass1Kt.class
+		PACKAGE METADATA
+			PROPERTY getSb()Ljava/lang/StringBuilder;
+				Property: class.metadata.property.returnType
+					K1
+						java/lang/StringBuilder /* = kotlin/text/StringBuilder^ */
+					K2
+						java/lang/StringBuilder

compiler/testData/codegen/box/kclass/kclass1.kt

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+// JVM_ABI_K1_K2_DIFF: KT-63864
+// Unsupported [This reflection API is not supported yet in JavaScript]
+// IGNORE_BACKEND: JS_IR, JS_IR_ES6, WASM
+// WITH_STDLIB
+
+package codegen.kclass.kclass1
+
+import kotlin.test.*
+
+val sb = StringBuilder()
+
+fun box(): String {
+    App(testQualified = true)
+    return sb.toString()
+}
+
+// Taken from:
+// https://github.com/SalomonBrys/kmffkn/blob/master/shared/main/kotlin/com/github/salomonbrys/kmffkn/app.kt
+
+@DslMarker
+annotation class MyDsl
+
+@MyDsl
+class DslMain {
+    fun <T: Any> kClass(block: KClassDsl.() -> T): T = KClassDsl().block()
+}
+
+@MyDsl
+class KClassDsl {
+    inline fun <reified T: Any> of() = T::class
+}
+
+fun <T: Any> dsl(block: DslMain.() -> T): T = DslMain().block()
+
+class TestClass
+
+@OptIn(kotlin.experimental.ExperimentalNativeApi::class)
+class App(testQualified: Boolean) {
+
+    var type = dsl {
+        kClass {
+            //kClass {  } // This should error if uncommented because of `@DslMarker`.
+            of<TestClass>()
+        }
+    }
+
+    init {
+        assertTrue(type.simpleName == "TestClass")
+        if (testQualified)
+            assertTrue(type.qualifiedName == "codegen.kclass.kclass1.TestClass") // This is not really necessary, but always better :).
+
+        assertTrue(String::class == String::class)
+        assertTrue(String::class != Int::class)
+
+        assertTrue(TestClass()::class == TestClass()::class)
+        assertTrue(TestClass()::class == TestClass::class)
+
+        sb.append("OK")
+    }
+}