Webhook TASKS_CREATED does not work when syncing from local storage

**Describe the bug**
When creating tasks with local storage, webhook request for task creation is not sent.

**To Reproduce**
1) Add Local Storage to Label Studio
2) Check option Treat every bucket object as a source file
3) Sync Tasks
This creates new tasks in the project, but `TASKS_CREATED` webhook is not executed.

**Expected behavior**
Should get a `TASKS_CREATED` webhook.

**Screenshots**

Doing this does not send `TASKS_CREATED` Webhook.

**Environment (please complete the following information):**
- OS: `Linux c6e799c0ddd1 5.10.102.1-microsoft-standard-WSL2`
- Label Studio Version `1.7.0`