Wildcard field should use constant_score and reject wildcard query rewrite param #69604
Description
The wildcard field doesn't use a regular index that is useful for relevance ranking and should always return a Constant_score wrapper around any queries that produce non-constant scores.
As was noted in this discuss post, the rewrite parameter should also be rejected or ignored if anything other than constant_score.
Rejecting may be a little harsh if querying across indices that have a mix of keyword and wildcard field so ignoring the rewrite param on wildcard fields may be more appropriate. The docs should reflect whatever we decide is best (wildcard query or wildcard field docs? Or both?)