[test] Mute failing irText tests

compiler/testData/ir/irText/firProblems/lambdaInEnumEntryConstructorCall.kt

@@ -1,4 +1,6 @@
 // WITH_STDLIB
+// IGNORE_BACKEND_K2: JS_IR
+// IGNORE_BACKEND_K2: JS_IR_ES6
 // KT-50774
 class Wrapper(var baseUrl: String)
 
@@ -11,4 +13,4 @@ enum class ConfigurationParameter {
     );
 
     constructor(apply: (String, Wrapper) -> Unit) {}
-}
+}