TopNav: Plugin page layouts / information architecture (#53174)

* Change nav structure when topnav is enable to do initial tests with new information architecture

* Support for nested sections

* Updated

* sentance case

* Progress on plugin challange

* Rewrite to functional component

* Progress

* Updates

* Progress

* Progress on things

* missing file

* Fixing issue with runtime, need to use setter way to set component exposed via runtime

* Move PageLayoutType to grafana/data

* Fixing breadcrumb issue, adding more tests

* reverted backend change

* fix recursive issue with cleanup

pkg/api/plugins.go

@@ -282,6 +282,7 @@ func (hs *HTTPServer) getPluginAssets(c *models.ReqContext) {
 	}
 
 	pluginFilePath := filepath.Join(absPluginDir, rel)
+
 	// It's safe to ignore gosec warning G304 since we already clean the requested file path and subsequently
 	// use this with a prefix of the plugin's directory, which is set during plugin loading
 	// nolint:gosec