preferencestore (#15018)

* Starting migration

* Migration finished

* Fix i18n

* Fix some tests

* Fix typos

* Remove overwite of http status

* Add i18n string

* Fix i18n

* fix breakages

* fix tests

Co-authored-by: Rodrigo Villablanca <villa061004@gmail.com>

app/user.go

@@ -1477,7 +1477,7 @@ func (a *App) PermanentDeleteUser(user *model.User) *model.AppError {
 	}
 
 	if err := a.Srv().Store.Preference().PermanentDeleteByUser(user.Id); err != nil {
-		return err
+		return model.NewAppError("PermanentDeleteUser", "app.preference.permanent_delete_by_user.app_error", nil, err.Error(), http.StatusInternalServerError)
 	}
 
 	if err := a.Srv().Store.Channel().PermanentDeleteMembersByUser(user.Id); err != nil {