evolve: use repo._bookmarks.recordchange instead of repo._bookmarks.write
We want to get rid of the api repo._bookmarks.write and this
patch removes its use in evolve.py.
Before this patch, we were using repo._bookmarks.write to save bookmarks change
immediately instead of repo._bookmarks.recordchange that write change when
transaction ends.
test-drop.t
test-simple4server.t
tests/test-simple4server-bundle2.t