[Serialization] Implement serialization checker for K2 version of plugin

^KT-53178 Fixed

plugins/kotlinx-serialization/testData/diagnostics/NonSerializable.fir.kt

@@ -1,16 +1,17 @@
 // WITH_STDLIB
+// FIR_DIFFERENCE: KT-53861
 // FILE: test.kt
 import kotlinx.serialization.*
 
 class NonSerializable
 
 @Serializable
-class Basic(val foo: NonSerializable)
+class Basic(val foo: <!SERIALIZER_NOT_FOUND("NonSerializable")!>NonSerializable<!>)
 
 @Serializable
-class Inside(val foo: List<NonSerializable>)
+class Inside(val foo: <!SERIALIZER_NOT_FOUND("NonSerializable")!>List<NonSerializable><!>)
 
 @Serializable
 class WithImplicitType {
-    val foo = NonSerializable()
+    <!SERIALIZER_NOT_FOUND("NonSerializable")!>val foo = NonSerializable()<!>
 }