Support plugin intrinsics for serializer() function in K2.

- Add IrPluginContext to JvmBackendContext, so plugin intrinsics can
reference external functions properly.

- Do not use module.findClassAcrossModuleDependencies as Descriptor API does not work for FIR.

- Add asm listing tests in serialization plugin for K2

- Remove Delegated.kt asm listing test as we have similar test in boxIr group.

#KT-56553 Fixed

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

@@ -19,7 +19,7 @@ object SerializableObject {}
 
 val module = SerializersModule {}
 
-inline fun <reified T: Any> getSer(module: SerializersModule): KSerializer<T> {
+inline fun <reified T : Any> getSer(module: SerializersModule): KSerializer<T> {
     return module.serializer<T>()
 }