Test suite broken with Java 9+ so we need to replace Sikuli
Sikuli is not in Buster/testing/sid anymore, because of at least:
OTOH, as mentioned by anonym on #15953 (comment 19330): “It’s worth noting
that we don’t use much of Sikuli. As long as we have an image matching
primitive that returns the coordinates of the match, implementing the
wait() etc we need is pretty easy. And something
xdotool (preferably something that will work in Wayland… if that
is even possible?) can do the rest (mouse and keyboard interaction)”.
And indeed, for example OpenQA supports Wayland, so even if we stick to our current testing framework, we could possibly steal some ideas and code from there wrt. the image matching primitives and interaction.
Feature Branch: test/15460-replace-sikuli-force-all-tests, https://salsa.debian.org/tails-team/tails/merge_requests/43