[test] Add Chiptracker loader test

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
[test] Improve delay effect test

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Better handling of note retrig on delay quirk

If the note retrig on delay quirk is enabled (QUIRK_RTDELAY), also
set the event note and reset envelopes.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>