fix API breakdown when inputting tags comprised solely of special characters

Steps to reproduce:
Note: Tag sanitization should be enabled from server side
1. Create a document.
2. go to the metadata section , add a tag in the tags section which only comprised of special characters.
3. open the network tab , save the tag
4. The server gives internal server error
Attaching a video for your reference too.

curl 'http://localhost:8080/nuxeo/api/v1/automation/Services.TagDocument' \
  -H 'Accept: application/json' \
  -H 'Content-Type: application/json' \
  -H 'X-NXRepository: default' \
  -H 'properties: *' \
  --data-raw '{"params":{"tags":"%%%"},"context":{},"input":"3f70b2cd-f8ac-49fe-ac28-7215bbec9e85"}' \
  --compressed