Pass plugin path around instead of redetecting

This is now set only once at the top level. This is needed for the
chainloading to work because we'll need to set the path when we create
the bridge.

src/plugin/bridges/vst3.cpp

@@ -24,9 +24,10 @@
 
 using namespace std::literals::string_literals;
 
-Vst3PluginBridge::Vst3PluginBridge()
+Vst3PluginBridge::Vst3PluginBridge(const ghc::filesystem::path& plugin_path)
     : PluginBridge(
           PluginType::vst3,
+          plugin_path,
           [](asio::io_context& io_context, const PluginInfo& info) {
               return Vst3Sockets<std::jthread>(
                   io_context,