Support array style url parameters

[davhdavh]

Some APIs (looking at you Mimir), have array parameters param[]:

curl --get -H 'X-Scope-Orgid: anonymous' --data-urlencode limit=3 --data-urlencode "label_names[]=uid" --data-urlencode "label_names[]=pod" 'http://10.110.68.127:8080/prometheus/api/v1/cardinality/label_values'

There seems to be no way to get infinity to generate 1 query parameter per array element if given an array in the query parameter values

[davhdavh]

Figured it out: /label_values?$__combineValues(label_names[]=,,&,${query0:csv})