JS: report about using of external interfaces in class literals

compiler/testData/diagnostics/testsWithJsStdLib/native/rtti/nativeInterfaceClassLiteral.kt

@@ -0,0 +1,5 @@
+external interface I
+
+fun box() {
+    println(<!NATIVE_INTERFACE_AS_CLASS_LITERAL!>I::class<!>)
+}

compiler/testData/diagnostics/testsWithJsStdLib/native/rtti/nativeInterfaceClassLiteral.txt

@@ -0,0 +1,9 @@
+package
+
+public fun box(): kotlin.Unit
+
+public external interface I {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}