Filter out fields containing * in their name from field_caps

[timroes]

Currently you can have fields in Elasticsearch containing * as a name. Those fields though will not behave very well across ES APIs since the * is treated as a wildcard in most APIs and thus will cause a wide range of problems, from e.g. us asking for date formatting on a field containing a * will accidentally ask for date formatting on all fields matching that wild card, which might not all be date fields and thus throw errors.

ES is considering disallowing fields containing * altogether: elastic/elasticsearch#76874

Since that will still require people who might have run into that issue to require reindexing their data to get rid of those fields from the mapping, I wanted to discuss if we simply want to filter out fields containing * when reading the _field_caps response (a simple if (fieldName.includes('*')) return; in field_caps_response.ts).

cc @nik9000

[elasticmachine]

Pinging @elastic/kibana-app-services (Team:AppServices)

[petrklapka]

Thank you for contributing to this issue, however, we are closing this issue due to inactivity as part of a backlog grooming effort. If you believe this feature/bug should still be considered, please reopen with a comment.