rebase: move bookmarks with --keep (issue5682) This is a regression caused by 3b7cb3d17137. We have documented the behavior in rebase help: Rebase will destroy original commits unless you use "--keep". It will also move your bookmarks (even if you do). So let's restore the old behavior. It is done by changing `scmutil.cleanupnodes` to accept more information so a node could have different "movement destination" from "successors". It also helps simplifying the callsite as a side effect - the special bookmark movement logic in rebase is removed. Differential Revision: https://phab.mercurial-scm.org/D727

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