IR: more consolidation of synthetic member generation for data class.

compiler/testData/codegen/box/dataClasses/copy/constructorWithDefaultParam.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 data class A(val a: Int = 1, val b: String = "$a") {}
 
 fun box() : String {

compiler/testData/codegen/box/dataClasses/copy/valInConstructorParams.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 data class A(val a: Int, val b: String) {}
 
 fun box() : String {

compiler/testData/codegen/box/dataClasses/copy/varInConstructorParams.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 data class A(var a: Int, var b: String) {}
 
 fun box() : String {

compiler/testData/codegen/box/dataClasses/copy/withGenericParameter.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 data class A(val a: Foo<String>) {}
 
 class Foo<T>(val a: T) { }

compiler/testData/codegen/box/dataClasses/copy/withSecondaryConstructor.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 data class A(val o: String, val k: String) {
     constructor() : this("O", "k")
 }