[FIR] Disable failing blackbox codegen tests for FIR.

compiler/testData/codegen/box/dataClasses/equals/alreadyDeclared.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 data class A(val x: Int) {
   override fun equals(other: Any?): Boolean = false
 }

compiler/testData/codegen/box/dataClasses/equals/alreadyDeclaredWrongSignature.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM
 
 // WITH_RUNTIME

compiler/testData/codegen/box/dataClasses/equals/genericarray.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 data class A(val v: Array<Int>)
 
 fun box() : String {

compiler/testData/codegen/box/dataClasses/equals/intarray.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 data class A(val v: IntArray)
 
 fun box() : String {

compiler/testData/codegen/box/dataClasses/equals/null.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 data class A(val v: Any?)
 
 data class B<T>(val v: T)

compiler/testData/codegen/box/dataClasses/equals/nullother.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 class Dummy {
   override fun equals(other: Any?) = true
 }

compiler/testData/codegen/box/dataClasses/equals/sameinstance.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 data class A(val arg: Any? = null)
 
 fun box() : String {