Allow to search with AND in the save object find API

[timroes]

It would be very useful (and the behavior we had prior 6.0) if we could search saved objects in the find API so that AND will be used instead of OR, i.e. searching for foo bar will now search for foo OR bar and not foo AND bar. There is currently no way in specifying that in the API.

We would need to be able to specify that in the API or maybe even change the default back to AND.

See also #20676

[elasticmachine]

Pinging @elastic/kibana-platform

[AlonaNadler]

@LeeDr's screenshot really explain the problem expressed by several of customers
#14687

[timroes]

That screenshot is actually another issue, NOT related to this one. That is the issue, that the visualization listing page sorts the results alphabetically and not by the native ES result order. That is issue #14687, which is not related to #20676. A demonstration of how that OR behavior works, can be seen in this GIF: