added the prometheus_remote_storage_remote_read_queries_total  (#7328)
added the prometheus_remote_storage_remote_read_queries_total  (#7328)

* added the prometheus_remote_storage_remote_read_queries_total query

Signed-off-by: njingco <b69980f6967dd9fc4eed38583a99cbed95ef6947@gmail.com>

* adjusted the help label of remoteReadQueriesTotal

Signed-off-by: njingco <b69980f6967dd9fc4eed38583a99cbed95ef6947@gmail.com>
kangwoo/prometheus,kangwoo/prometheus,kangwoo/prometheus,prometheus/prometheus,keegancsmith/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,prometheus/prometheus,prometheus/prometheus,GoogleCloudPlatform/prometheus,GoogleCloudPlatform/prometheus,keegancsmith/prometheus,kangwoo/prometheus,alileza/prometheus,alileza/prometheus,keegancsmith/prometheus,GoogleCloudPlatform/prometheus,alileza/prometheus,prometheus/prometheus,prometheus/prometheus,alileza/prometheus