touchpad: add escape and asterisk to the DWT blacklist

touchpad: add escape and asterisk to the DWT blacklist

The escape key can be used to cancel a drag and drop action in some
desktop environments. However, it triggers disable-while-typing, ending
the drag and drop action rather than cancelling it.

Add it to the tp_key_ignore_for_dwt() set to avoid it.

Since I'm here, add the asterisk key as it is the only numpad key not
ignored by tp_key_ignore_for_dwt().

Fix: https://gitlab.freedesktop.org/libinput/libinput/-/issues/820  # [1]
Suggested-by: satrmb <10471-satrmb@users.noreply.gitlab.freedesktop.org>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>