refactor(c/driver/postgresql): Use GetObjectsHelper from framework to build objects #445

Job	Run time
check (macOS, adbcbigquery) / r-check	2m 42s
check (macOS, adbcdrivermanager) / r-check	1m 34s
check (macOS, adbcflightsql) / r-check	2m 19s
check (macOS, adbcpostgresql) / r-check	1m 50s
check (macOS, adbcsnowflake) / r-check	2m 20s
check (macOS, adbcsqlite) / r-check	1m 52s
check (ubuntu, adbcbigquery) / r-check	2m 43s
check (ubuntu, adbcdrivermanager) / r-check	1m 53s
check (ubuntu, adbcpostgresql) / r-check	2m 39s
check (ubuntu, adbcflightsql) / r-check	3m 16s
check (ubuntu, adbcsnowflake) / r-check	2m 38s
check (ubuntu, adbcsqlite) / r-check	2m 0s
check (windows, adbcbigquery) / r-check	3m 15s
check (windows, adbcdrivermanager) / r-check	3m 13s
check (windows, adbcflightsql) / r-check	3m 12s
check (windows, adbcpostgresql) / r-check	3m 11s
check (windows, adbcsnowflake) / r-check	3m 11s
check (windows, adbcsqlite) / r-check	3m 8s
	46m 56s

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