selftests/hid: add tests for missing release on the Dell Synaptics

Add a simple test for the corner case not currently covered by the
sticky fingers quirk. Because it's a corner case test, we only test this
on a couple of devices, not on all of them because the value of adding
the same test over and over is rather moot.

Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Jiri Kosina <jkosina@suse.com>