Teach git-revise how to copy notes

[larsks]

git-revise does not appear to copy notes, unlike git rebase and git commit --amend. It would be great if it learned how to copy notes by default, ideally making use of the existing notes.notesRewriteRef option (and maybe adding a notes.rewrite.revise option, inline with notes.rewrite.amend and notes.rewrite.rebase).