Unify handling for *::{get,set}State

Since these functions are exactly the same, and for whatever reason they
didn't just add them to the `IPluginBase` both `IComponent` and
`IEditController`. inherit from

src/common/serialization/vst3.h

@@ -59,6 +59,8 @@ struct WantsConfiguration {
  */
 using ControlRequest = std::variant<Vst3PluginProxy::Construct,
                                     Vst3PluginProxy::Destruct,
+                                    Vst3PluginProxy::SetState,
+                                    Vst3PluginProxy::GetState,
                                     YaAudioProcessor::SetBusArrangements,
                                     YaAudioProcessor::GetBusArrangement,
                                     YaAudioProcessor::CanProcessSampleSize,
@@ -73,8 +75,6 @@ using ControlRequest = std::variant<Vst3PluginProxy::Construct,
                                     YaComponent::GetRoutingInfo,
                                     YaComponent::ActivateBus,
                                     YaComponent::SetActive,
-                                    YaComponent::SetState,
-                                    YaComponent::GetState,
                                     YaPluginBase::Initialize,
                                     YaPluginBase::Terminate,
                                     YaPluginFactory::Construct,