[test] Mute failing irText tests

compiler/testData/ir/irText/firProblems/kt43342.kt

@@ -1,4 +1,6 @@
 // WITH_STDLIB
+// IGNORE_BACKEND_K2: JS_IR
+// IGNORE_BACKEND_K2: JS_IR_ES6
 
 open class ControlFlowInfo<K, V>(val map: Map<K, V>): Map<K, V> by map
 
@@ -7,4 +9,4 @@ class StringFlowInfo(map: Map<String, String>): ControlFlowInfo<String, String>(
         keys
         info.keys
     }
-}
+}