Use request.CTX instead of *request.Context (#24877)

* Use request.CTX instead of *request.Context

* Fix tests

server/channels/app/webhook.go

@@ -657,7 +657,7 @@ func (a *App) RegenOutgoingWebhookToken(hook *model.OutgoingWebhook) (*model.Out
 	return webhook, nil
 }
 
-func (a *App) HandleIncomingWebhook(c *request.Context, hookID string, req *model.IncomingWebhookRequest) *model.AppError {
+func (a *App) HandleIncomingWebhook(c request.CTX, hookID string, req *model.IncomingWebhookRequest) *model.AppError {
 	if !*a.Config().ServiceSettings.EnableIncomingWebhooks {
 		return model.NewAppError("HandleIncomingWebhook", "web.incoming_webhook.disabled.app_error", nil, "", http.StatusNotImplemented)
 	}
@@ -817,7 +817,7 @@ func (a *App) CreateCommandWebhook(commandID string, args *model.CommandArgs) (*
 	return savedHook, nil
 }
 
-func (a *App) HandleCommandWebhook(c *request.Context, hookID string, response *model.CommandResponse) *model.AppError {
+func (a *App) HandleCommandWebhook(c request.CTX, hookID string, response *model.CommandResponse) *model.AppError {
 	if response == nil {
 		return model.NewAppError("HandleCommandWebhook", "app.command_webhook.handle_command_webhook.parse", nil, "", http.StatusBadRequest)
 	}