Main lcitool changes:
- added Alpine 3.17 and 3.18 targets
- dropped Alpine 3.15 and 3.16
Note that we're not actively testing all Alpine targets due to CI
quota, so only 3.17 is used as a replacement for 3.15 in this patch.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
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