[MM-55268] Implement ServeMetrics plugins hook (#24249)

* Implement ServeMetrics plugins hook

* Update error id

* Simplify

* Revert "Simplify"

This reverts commit c9dc5d5eac6c933ff69e158cf3e34d0973bd3bcd.

* Add comment and error handler

* Wrap error

* Update translation file

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/public/plugin/interface_generator/main.go

@@ -37,6 +37,7 @@ var excludedPluginHooks = []string{
 	"PluginHTTP",
 	"ServeHTTP",
 	"UploadData",
+	"ServeMetrics",
 }
 
 var excludedProductHooks = []string{