GOCBC-1588: Fix failing conjunction and disjunction queries

Motivation
----------
Currently when used against Stellar Gateway gocb returns invalid query option specified for valid Conjunction and Disjunction queries.

Changes
-------
Corrected the parsing of the nested query arrays.

Change-Id: I777f69fdcaac1a694f86262b262386fcf55acb25
Reviewed-on: https://review.couchbase.org/c/gocb/+/203660
Reviewed-by: Charles Dixon <chvckd@gmail.com>
Tested-by: Jack Westwood <jack.westwood@couchbase.com>

search/internal.go

@@ -115,7 +115,7 @@ func (i Internal) mapDateRangeFacetToPs(dateRanges []dateFacetRange) []*search_v
 }
 
 // helper function for handling conjunct/disjunct which consist of multiple queries.
-func (i Internal) mapQueriesToPs(queries ...Query) ([]*search_v1.Query, error) {
+func (i Internal) mapQueriesToPs(queries []Query) ([]*search_v1.Query, error) {
 	out := make([]*search_v1.Query, len(queries))
 	var err error
 	for index, query := range queries {