test: add log_dir flag to mysqlctl stop process to log the output in the correct directory
test: add log_dir flag to mysqlctl stop process to log the output in the correct directory

Signed-off-by: Manan Gupta <78fb1e040152fc0d289292783ed01a56d3ae9465@planetscale.com>

mahak/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,mahak/vitess,mahak/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess