### Godot version

4.0.beta10 mono and standard

### System information

Windows 10 64bits

### Issue description

When exporting a project, Godot fails to bundle the required DLLs from the GDExtension to the export folder:

```
editor/export/editor_export_plugin.h:123 - Required virtual method EditorExportPlugin::_get_name must be overridden before calling.
  No suitable library found for GDExtension: res://webrtc/webrtc.gdextension. Possible feature flags for your platform: pc, s3tc, windows, x86_64, template, template_debug
```

### Steps to reproduce

Export for Windows with the existing configuration: WebRTC DLLs won't be copied in the export folder

### Minimal reproduction project

[Repro.zip](https://github.com/godotengine/godot/files/10368987/Repro.zip)

EditorProgress ep("savepack", TTR("Packing"), 102, true);
	
	Ref<DirAccess> da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
	da->make_dir_recursive(EditorPaths::get_singleton()->get_cache_dir());
	String tmppath = EditorPaths::get_singleton()->get_cache_dir().path_join("packtmp");
	Ref<FileAccess> ftmp = FileAccess::open(tmppath, FileAccess::WRITE);
	if (ftmp.is_null()) {
		add_message(EXPORT_MESSAGE_ERROR, TTR("Save PCK"), vformat(TTR("Cannot create file \"%s\"."), tmppath));
		return ERR_CANT_CREATE;
	}
	PackData pd;
	pd.ep = &ep;
	pd.f = ftmp;
	pd.so_files = p_so_files;
	Error err = export_project_files(p_preset, p_debug, _save_pack_file, &pd, _add_shared_object);
	
	pd.f.unref();
	ftmp.unref();
	if (err != OK) {
		DirAccess::remove_file_or_error(tmppath);
		add_message(EXPORT_MESSAGE_ERROR, TTR("Save PCK"), TTR("Failed to export project files."));
		return err;
	}
	pd.file_ofs.sort(); 
	Ref<FileAccess> f;
	int64_t embed_pos = 0;
	if (!p_embed) {
		
		f = FileAccess::open(p_path, FileAccess::WRITE);