[Serialization] Migrate all tests to new test infrastructure

plugins/kotlinx-serialization/testData/boxIr/annotationsOnFile.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM_IR
 
 // WITH_STDLIB
@@ -75,4 +74,4 @@ fun testOnFile(): String {
 
 fun box(): String {
     return testOnFile()
-}
+}

plugins/kotlinx-serialization/testData/boxIr/classSerializerAsObject.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM_IR
 
 // WITH_STDLIB
@@ -65,4 +64,4 @@ fun box(): String {
     assertEquals("ObjectSerializerDummy", descs[3].serialName)
     assertEquals("ClassSerializerOnClass", descs[4].serialName)
     return "OK"
-}
+}

plugins/kotlinx-serialization/testData/boxIr/enumsAreCached.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM_IR
 
 // WITH_STDLIB
@@ -45,4 +44,4 @@ fun testSerialization(previous: String): String {
 
 fun box(): String {
     return testSerialization(testSerializers())
-}
+}

plugins/kotlinx-serialization/testData/boxIr/generics.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM_IR
 
 // WITH_STDLIB
@@ -19,4 +18,4 @@ fun box(): String {
     val decoded = Json.decodeFromString(Holder.serializer(), str)
     if (decoded.f1.t != holder.f1.t) return "f1.t: ${decoded.f1.t}"
     return "OK"
-}
+}

plugins/kotlinx-serialization/testData/boxIr/inlineClasses.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM_IR
 
 // WITH_STDLIB
@@ -19,4 +18,4 @@ fun box(): String {
     val s = Json.encodeToString(Holder.serializer(), Holder(Foo(42)))
     if (s != """{"f":42}""") return s
     return "OK"
-}
+}

plugins/kotlinx-serialization/testData/boxIr/sealedInterfaces.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 // TARGET_BACKEND: JVM_IR
 
 // WITH_STDLIB
@@ -34,4 +33,4 @@ fun box(): String {
     desc.checkKind(1, "OPEN")
     desc.checkKind(2, "SEALED")
     return "OK"
-}
+}