### Description

The [Terms Set Query](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-terms-set-query.html) lets you match documents that have some minimum number of matches to a given array of input search terms. The minimum number of matches however can only be specified by referencing another field on the document or by using a script.  

I have a use case where I need to be able to specify the minimum number of terms to match at query time, agnostic of documents so the `minimum_should_match_field` is not useful. Further, since I know I need to match a minimum of exactly, say, 3 terms, it seems like overkill to have to enable and using scripting (as in the use of `minimum_should_match_script`) to just return a static number.

Today as an alternative, I'm instead using a Bool Query with a `minimum_should_match` accepting my explicit number and all of my input search terms mapping to an array of individual `{ term: { field: value } }` entries in the `should` array of the bool. However, this is very json-inefficient, especially when I am making queries with many (possibly thousands) of terms in my query.

I was so happy to find the Terms Set query as a leaner, more specialized alternative to my massive `should` array but was then very surprised that there was no query-time input for the minimum match count (outside scripting).

**TL;DR:** Terms Set query should support a third possible top-level parameter for specifying the minimum number of terms to match which simply accepts a number, like `minimum_should_match`
server/src/test/java/org/elasticsearch/index/query/TermsSetQueryBuilderTests.java
String expectedFieldName = expectedFieldName(queryBuilder.getFieldName());
        for (int i = 0; i < randomTerms.size(); i++) {
            Term term = new Term(expectedFieldName, randomTerms.get(i));
            assertThat(termQueries.get(i), equalTo(new TermQuery(term)));
        }
    }
    private static List<?> randomValues(final String fieldName) {
        final int numValues = randomIntBetween(0, 10);
        final List<Object> values = new ArrayList<>(numValues);
        for (int i = 0; i < numValues; i++) {
            values.add(getRandomValueForFieldName(fieldName));
        }
        return values;
    }
    public static class CustomScriptPlugin extends MockScriptPlugin {
        @Override
        protected Map<String, Function<Map<String, Object>, Object>> pluginScripts() {
            return Collections.singletonMap("_script", args -> {
                try {
                    int clauseCount = ObjectPath.evaluate(args, "params.num_terms");
                    long msm = ((ScriptDocValues.Longs) ObjectPath.evaluate(args, "doc.m_s_m")).getValue();
                    return clauseCount * (msm / 100d);
                } catch (IOException e) {
                    throw new UncheckedIOException(e);
                }
            });
        }
    }
}