Merge branch 'pw/rebase-i-after-failure' into maint-2.42

Various fixes to the behaviour of "rebase -i" when the command got interrupted by conflicting changes. cf. <6b927687-cf6e-d73e-78fb-bd4f46736928@gmx.de> * pw/rebase-i-after-failure: rebase -i: fix adding failed command to the todo list rebase --continue: refuse to commit after failed command rebase: fix rewritten list for failed pick sequencer: factor out part of pick_commits() sequencer: use rebase_path_message() rebase -i: remove patch file after conflict resolution rebase -i: move unlink() calls