Add IR equivalent of the WriteFlags test

compiler/testData/writeFlags/function/constructors/enum.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JVM_IR
 enum class Foo {
     A, B, C
 }

compiler/testData/writeFlags/function/constructors/objectLiteral.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JVM_IR
 class Foo {
   fun a() {
     val s = object { }

compiler/testData/writeFlags/function/deprecatedFlag/getterAnnotationOnProperty.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JVM_IR
 class MyClass() {
     @Deprecated("") val test = ""
 }

compiler/testData/writeFlags/function/deprecatedFlag/setterAnnotationOnProperty.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JVM_IR
 class MyClass() {
     @Deprecated("") var test = ""
 }

compiler/testData/writeFlags/function/withDefaultArguments/funInClass.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JVM_IR
 class MyClass() {
     fun test(s: String = "") {}
 }

compiler/testData/writeFlags/function/withDefaultArguments/funInClassObject.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JVM_IR
 class MyClass() {
     companion object {
         fun test(s: String, x:Int = 10) {}

compiler/testData/writeFlags/function/withDefaultArguments/inlineOnlyFunInClass.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JVM_IR
 class MyClass() {
     @Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
     @kotlin.internal.InlineOnly

compiler/testData/writeFlags/function/withDefaultArguments/reifiedFunInClass.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JVM_IR
 class MyClass() {
     inline fun <reified T> test(s: String = "") {}
 }

compiler/testData/writeFlags/function/withDefaultArguments/topLevelFun.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND: JVM_IR
 fun test(s: String = "") {}
 
 // TESTED_OBJECT_KIND: function