[FIR] Disable failing blackbox codegen tests for FIR.

compiler/testData/codegen/box/enum/defaultCtor/constructorWithDefaultArguments.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 enum class Test(val str: String = "OK") {
     OK
 }

compiler/testData/codegen/box/enum/defaultCtor/constructorWithVararg.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 enum class Test(vararg xs: Int) {
     OK;
     val values = xs

compiler/testData/codegen/box/enum/defaultCtor/entryClassConstructorWithDefaultArguments.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 enum class Test(val str: String = "OK") {
     OK {
         fun foo() {}

compiler/testData/codegen/box/enum/defaultCtor/entryClassConstructorWithVarargs.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 // IGNORE_BACKEND: JS
 
 

compiler/testData/codegen/box/enum/defaultCtor/secondaryConstructorWithDefaultArguments.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 enum class Test(val x: Int, val str: String) {
     OK;
     constructor(x: Int = 0) : this(x, "OK")

compiler/testData/codegen/box/enum/defaultCtor/secondaryConstructorWithVararg.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 enum class Test(val x: Int, val str: String) {
     OK;
     constructor(vararg xs: Int) : this(xs.size + 42, "OK")