sparse: move code for clearing rules to core This is a pretty straightforward port.

sparse: move post commit actions into core Instead of wrapping committablectx.markcommitted(), we inline the call into workingctx.markcommitted(). Per smf's review, workingctx is the proper location for this code, as committablectx is the shared base class for it and memctx. Since this code touches the working directory, it belongs in workingctx.

cleanupnode: do not use generator for node mapping The 'successors' part of the mappings used of be a tuple. This avoid issue from code consuming the generator "by mistake". For example, an extension inspecting the mapping content used to be able to iterate over the successors mapping without consequence. Since the mapping are small we do not expect any performance impact we use tuple again for this.

histedit: use scmutil.cleanupnodes (BC) This is marked as BC because the strip backup file name has changed.

histedit: unify strip backup files on success (BC) Previously we wrote two different strip backup files on success. This patch unifies them. It will make scmutil.cleanupnodes migration more smooth.

histedit: pass multiple nodes to strip (BC) Previously, histedit.cleanupnode pass root nodes one by one. Since repair.strip takes multiple nodes and can handle them just fine, pass all strip roots at once. This is BC because the number of strip backup files may change from N to 1.

histedit: remove "name" parameter from cleanupnode functions The "name" parameter is not used any longer so let's remove it.

histedit: remove "should strip" debug message The debug message was not used anywhere. Removed it to make scmutil.cleanupnodes migration easier to reason about.

histedit: move topmost bookmark movement to a separate function histedit treats topmost bookmark movement specially. The rest of the bookmark movement could be handled by scmutil.cleanupnodes. So let's move the special logic out to make the patch easier to review.

histedit: remove moving bookmarks message on verbose (BC) This is more consistent with other commands, like "commit -v" won't show bookmark movement messages. It will make migrating to scmutil.cleanupnodes easier.