Support connection option for quota key

**Is your feature request related to a problem? Please describe.**
`clickhouse.WithQuotaKey` actually not working. According to https://github.com/ClickHouse/clickhouse-go/blob/v2.8.0/conn_handshake.go#L86-L88 it's possible to set quota key in connection level. There is some work need to be done.

**Describe the solution you'd like**
Maybe `clickhouse.Option` can provide an entry for user to set quota key.

**Describe alternatives you've considered**
It's better that the server side supports query quota key.But According to https://github.com/ClickHouse/ClickHouse/pull/39874#issuecomment-1204577354, this feature seems need to be done.

**Additional context**
Btw,[ document on official website](https://clickhouse.com/docs/en/integrations/go#using-context) about setting quota key through context is confusing.As for now, it's not working as expected.

Start with conn_handshake.go lines 86-88 and trace how clickhouse.Option values are passed into connection setup. Compare that path with the documented context-based quota-key behavior and the existing WithQuotaKey handling. Done means a connection-level option can set the quota key as requested and the behavior is covered by the project’s relevant tests.

Written by the indexing model from the issue text.