[test] Run irText tests against K1 frontend for JS

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

@@ -2,6 +2,8 @@
 // See KT-44312
 // IGNORE_BACKEND_K2: ANY
 //  ^ TODO decide if we want to fix KT-42020 for FIR as well
+// IGNORE_BACKEND_K1: JS_IR
+// IGNORE_BACKEND_K1: JS_IR_ES6
 
 open class Base<T> {
     fun foo(x: T) {}
@@ -66,4 +68,4 @@ open class Outer<T> {
 
 class OuterDerived : Outer<String>() {
     inner class InnerDerived : Inner()
-}
+}