Connection methods does not accept classic nor unusual arguments supported in other pgsql connection solution

Hello,

While trying to configure a Cockroach DB cluster async connection, there seems to be missing support for usual PostgreSQL parameters (or renamed) or supported options not frequently used.

I don't know why the connection part does not seems to follow other library but it would be nice to at least support all options existing in postgresql client (even renamed ^^).

For example, the part I am missing to connect is options keyword. It is used to provide complementary informations on the connection (in my case a cluster id to identify exact connection). Guess it is not mandatory by itself but it fells strange to have the issue only on asyncpg :/

• asyncpg version: Version: 0.26.0
• PostgreSQL version:
• Do you use a PostgreSQL SaaS? If so, which? Can you reproduce
  the issue with a local PostgreSQL install?: Cockroach Cloud
• Python version: 3.10.7 (venv)
• Platform: Linux (Docker VSCode python dev container)
• Do you use pgbouncer?: No
• Did you install asyncpg with pip?: Yes (using setuptools)
• If you built asyncpg locally, which version of Cython did you use?:
• Can the issue be reproduced under both asyncio and
  uvloop?:

Il report cita i metodi di connessione di asyncpg e il parametro options del client PostgreSQL, ma non indica alcun file del repository né alcun test. Inizia individuando il punto di ingresso della connessione e confrontando i suoi argomenti accettati con le opzioni di PostgreSQL. Definisci l’ambito supportato prima dell’implementazione; il lavoro è completato quando l’opzione di connessione richiesta viene accettata ed è coperta da un test di regressione.