surpress warnings for known unused event types

[ethanholter]

When using newer gamepads such as the Dualshock 5 it's pretty common to see messages along the lines of Unknown event type 1623. These messages can be useful for maintainers of the joystick_drivers package but the average joe doesn't really care.

In some scenarios, such as with the aforementioned Dualshock 5, these messages will be printed in a torrential flood at whatever rate the joy_node is publishing at. It is quite frustrating to suddenly need to sift through hundreds of lines of repeated log messages simply because I accidentally bumped my controllers touch pad.

This pull request proposes adding a list of SDL events which are explicitly known to pose no function within the joy_node. This way any actually anomalous unknown events can still be logged without the worry of drowning in useless log messages