[MM-15121] Migrate "WebHook.GetIncomingList" to Sync by default (#10666)

* SyncStore: migrate WebHooks.SaveIncoming method to Sync

* MM-15121 Migrate WebHook.GetIncomingList to Sync by default

* MM-15121 Migrate WebHook.GetIncomingList to Sync by default - add review changes

* Revert "SyncStore: migrate WebHooks.SaveIncoming method to Sync"

This reverts commit 626a7d1a256e6ffe1dae108918d4129501947951.

app/webhook.go

@@ -392,11 +392,7 @@ func (a *App) GetIncomingWebhooksPage(page, perPage int) ([]*model.IncomingWebho
 		return nil, model.NewAppError("GetIncomingWebhooksPage", "api.incoming_webhook.disabled.app_error", nil, "", http.StatusNotImplemented)
 	}
 
-	if result := <-a.Srv.Store.Webhook().GetIncomingList(page*perPage, perPage); result.Err != nil {
-		return nil, result.Err
-	} else {
-		return result.Data.([]*model.IncomingWebhook), nil
-	}
+	return a.Srv.Store.Webhook().GetIncomingList(page*perPage, perPage)
 }
 
 func (a *App) CreateOutgoingWebhook(hook *model.OutgoingWebhook) (*model.OutgoingWebhook, *model.AppError) {