feat(go/adbc/driver/flightsql): expose FlightInfo during polling #278

Job	Run time
check (ubuntu, adbcdrivermanager) / r-check	2m 11s
check (ubuntu, adbcflightsql) / r-check	3m 13s
check (ubuntu, adbcpostgresql) / r-check	1m 59s
check (ubuntu, adbcsnowflake) / r-check	2m 37s
check (ubuntu, adbcsqlite) / r-check	2m 4s
	12m 4s

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