evolve: delete evolvestate after aborting interrupted `next --evolve`
We didn't use to delete the evolvestate after aborting an interrupted `next
--evolve`. This patch makes sure we do that. The test changes demonstrate the
fix and we add a CHANGELOG entry about the fix.
tests: check that we delete evolvestate correctly after abort/stop
This patch adds test to check whether we delete the evolvestate correctly after
aborting or stopping an interrupted evolve which is caused because of `next
--evolve`.