Product: Error message is displayed when clearing all tags even though saving succeeds

[itsmeichigo]

Describe the bug
When clearing all tags for a product, there's always an alert displayed saying the creation fails even though the saving succeeds.

To Reproduce
Steps to reproduce the behavior:

1. Log in to a store.
2. Create a new product or select an existing product.
3. Add at least one tag to the product and save changes if the product doesn't have any tag yet.
4. Reopen the tag list for the same product, clear all tags and tap Save.
5. Notice that an error alert is displayed.
6. Check the network request using Proxyman or Charles and confirm that the save request is completed without any error.

Screenshots
https://github.com/user-attachments/assets/7d47591a-2467-4488-bdad-a64e6bd6a9d8

Expected behavior
The error alert should not be displayed because the request did not fail.

[dangermattic]

🚫 Please add a type label (e.g. type: enhancement) and a feature label (e.g. feature: stats) to this issue.