Kibana should set lenient=true query param

[vbohata]

For ES indices containing non-text default fields, the Kibana ofter returns "shards failed", error "Can only use prefix queries on keyword and text fields" or similar. This is caused by default fields and users typing something like "error*" to kibana query bar. For LUCENE only syntax it is possible to include "lenient" param to query:queryString:options. For KQL it is not possible. In the ES 6 days where beats did not defined default fields for templates it was working file with _all. Now the Kibana shoud pass lenient param to make better user experience. This param is even very practical. Lets imagine we want to find string beginning with "somestr*" while the field containing this string is not known. Simply querying all fields without passing "lenient" to true causes query to fail.

[elasticmachine]

Pinging @elastic/kibana-app-arch (Team:AppArch)

[lukasolson]

(Somewhat) related: #17014

[elasticmachine]

Pinging @elastic/kibana-data-discovery (Team:DataDiscovery)

[kertal]

Closing this because it's not planned to be resolved in the foreseeable future. It will be tracked in our Icebox and will be re-opened if our priorities change. Feel free to re-open if you think it should be melted sooner.