[test] Run irText tests against K1 frontend for JS

compiler/testData/ir/irText/classes/cloneable.kt

@@ -1,5 +1,8 @@
 // FIR_IDENTICAL
 // SKIP_KLIB_TEST
+// IGNORE_BACKEND_K1: JS_IR
+// IGNORE_BACKEND_K1: JS_IR_ES6
+
 class A : Cloneable
 
 interface I : Cloneable
@@ -8,4 +11,4 @@ class C : I
 
 class OC : I {
     override fun clone(): OC = OC()
-}
+}