Reload supported interfaces after IPluginBase::initialize()

This is needed as a workaround to support Waves VST3 plugins.

Right now does does not actually fix the issue because the arguments are
not updated in the subclasses. The next commit will fix this.

src/plugin/bridges/vst3-impls/plugin-proxy.cpp

@@ -1057,10 +1057,18 @@ tresult PLUGIN_API Vst3PluginProxyImpl::initialize(FUnknown* context) {
         host_application = host_context;
         plug_interface_support = host_context;
 
-        return bridge.send_message(YaPluginBase::Initialize{
-            .instance_id = instance_id(),
-            .host_context_args = Vst3HostContextProxy::ConstructArgs(
-                host_context, instance_id())});
+        const InitializeResponse response =
+            bridge.send_message(Vst3PluginProxy::Initialize{
+                .instance_id = instance_id(),
+                .host_context_args = Vst3HostContextProxy::ConstructArgs(
+                    host_context, instance_id())});
+
+        // HACK: For some reason, Waves plugins will only allow querying the
+        //       `IEditController` interface after this point, so we need to
+        //       update the list of interfaces we support for this object.
+        arguments = response.updated_plugin_interfaces;
+
+        return response.result;
     } else {
         bridge.logger.log(
             "WARNING: Null pointer passed to 'IPluginBase::initialize()'");