Move some tests from boxWithStdlib/ to box/

Move those tests which do not require neither stdlib nor reflect

compiler/testData/codegen/box/casts/functions/asFunKSmall.kt

@@ -0,0 +1,44 @@
+fun fn0() {}
+fun fn1(x: Any) {}
+
+inline fun asFailsWithCCE(operation: String, block: () -> Unit) {
+    try {
+        block()
+    }
+    catch (e: java.lang.ClassCastException) {
+        return
+    }
+    catch (e: Throwable) {
+        throw AssertionError("$operation: should throw ClassCastException, got $e")
+    }
+    throw AssertionError("$operation: should throw ClassCastException, no exception thrown")
+}
+
+inline fun asSucceeds(operation: String, block: () -> Unit) {
+    try {
+        block()
+    }
+    catch (e: Throwable) {
+        throw AssertionError("$operation: should not throw exceptions, got $e")
+    }
+}
+
+class MyFun: Function<Any>
+
+fun box(): String {
+    val f0 = ::fn0 as Any
+    val f1 = ::fn1 as Any
+
+    val myFun = MyFun() as Any
+
+    asSucceeds("f0 as Function0<*>") { f0 as Function0<*> }
+    asFailsWithCCE("f0 as Function1<*, *>") { f0 as Function1<*, *> }
+    asFailsWithCCE("f1 as Function0<*>") { f1 as Function0<*> }
+    asSucceeds("f1 as Function1<*, *>") { f1 as Function1<*, *> }
+
+    asFailsWithCCE("myFun as Function0<*>") { myFun as Function0<*> }
+    asFailsWithCCE("myFun as Function1<*, *>") { myFun as Function1<*, *> }
+
+
+    return "OK"
+}