[FIR] Mute failing tests

compiler/testData/ir/irText/declarations/multiplatform/expectClassInherited.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 // !LANGUAGE: +MultiPlatformProjects
 
 expect abstract class A protected constructor() {

compiler/testData/ir/irText/declarations/multiplatform/expectedEnumClass.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 // !LANGUAGE: +MultiPlatformProjects
 
 expect enum class MyEnum {

compiler/testData/ir/irText/declarations/multiplatform/expectedSealedClass.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 // !LANGUAGE: +MultiPlatformProjects
 
 expect sealed class Ops()

compiler/testData/ir/irText/declarations/parameters/useNextParamInLambda.kt

@@ -1,3 +1,4 @@
+// IGNORE_BACKEND_FIR: JVM_IR
 fun f(
     f1: () -> String = { f2() },
     f2: () -> String = { "FAIL" }