refactor(c/driver_manager): differentiate errors from driver manager #205

Job	Run time
check (macOS, adbcdrivermanager) / r-check	2m 45s
check (macOS, adbcsnowflake) / r-check	4m 55s
check (macOS, adbcflightsql) / r-check	3m 33s
check (macOS, adbcpostgresql) / r-check	3m 23s
check (macOS, adbcsqlite) / r-check	2m 45s
check (ubuntu, adbcflightsql) / r-check	3m 38s
check (ubuntu, adbcdrivermanager) / r-check	1m 37s
check (ubuntu, adbcpostgresql) / r-check	1m 59s
check (ubuntu, adbcsnowflake) / r-check	2m 43s
check (ubuntu, adbcsqlite) / r-check	1m 42s
check (windows, adbcdrivermanager) / r-check	3m 36s
check (windows, adbcflightsql) / r-check	4m 51s
check (windows, adbcsnowflake) / r-check	7m 5s
check (windows, adbcpostgresql) / r-check	4m 30s
check (windows, adbcsqlite) / r-check	4m 46s
	53m 48s

Provide feedback