[client-v2] Port "set_roles" feature

[chernser]

Description

Client V1 supports remembering roles for sending with requests: https://clickhouse.com/docs/en/interfaces/http#setting-role-with-query-parameters https://github.com/ClickHouse/clickhouse-java/issues/1782 will implement sending custom query parameters that should solve "problem" for the feature.

Expected Behavior

• User may define custom query parameter on client and operation level
• It should be possible to set multiple values for one key