[ES|QL] to_date_nanos lacks signatures in Kibana metadata #115874
Description
Elasticsearch Version
main
Installed Plugins
No response
Java Version
bundled
OS Version
Sonoma 14.7
Problem Description
The JSON metadata for the to_date_nanos function does not include a list of acceptable signatures.
Without these, the editor will show the user false errors.
Steps to Reproduce
Check the file
Logs (if relevant)
No response