[test] Mute failing irText tests

compiler/testData/ir/irText/expressions/argumentMappedWithError.kt

@@ -1,4 +1,7 @@
 // FIR_IDENTICAL
+// IGNORE_BACKEND_K2: JS_IR
+// IGNORE_BACKEND_K2: JS_IR_ES6
+
 fun <R : Number> Number.convert(): R = TODO()
 
 fun foo(arg: Number) {
@@ -7,4 +10,4 @@ fun foo(arg: Number) {
 fun main(args: Array<String>) {
     val x: Int = 0
     foo(x.convert())
-}
+}