Allow to set the minimum number of should clauses required to match for boolean predicates in the DSL

See org.apache.lucene.search.BooleanQuery.Builder#setMinimumNumberShouldMatch and https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-minimum-should-match.html

We might want to allow either an absolute number of clauses (what the Lucene APIs offer) or a percentage (what both Solr and Elasticsearch offer, as an alternative).

We should probably backport this to 5.10, since the lack of such a feature must be really annoying when using the Elasticsearch integration: you basically have to write the whole boolean query and its subqueries as JSON if you want to set a minimum number of should clauses required to match. This means in particular no field bridge, and having to serialize filter parameters to JSON yourself.