[MM-19948] Set version on module file and internal paths (#13186)

* [MM-19948] Set version on module file and internal paths

* Fixes after merge

* Fix i18n checker error

imports/placeholder.go

@@ -6,6 +6,6 @@ package imports
 // This is a placeholder so this package can be imported in Team Edition when it will be otherwise empty
 
 import (
-	_ "github.com/mattermost/mattermost-server/migrations"
-	_ "github.com/mattermost/mattermost-server/plugin/scheduler"
+	_ "github.com/mattermost/mattermost-server/v5/migrations"
+	_ "github.com/mattermost/mattermost-server/v5/plugin/scheduler"
 )