copies-rust: yield both p1 and p2 copies in `ChangedFiles.actions()`...
copies-rust: yield both p1 and p2 copies in `ChangedFiles.actions()`
Instead of filtering the relevant parent inside de ChangedFiles method, we now
yield all copies information and let the caller do the filtering. Soon, the
filtering will be replaced by dispatching.
Differential Revision:
https://phab.mercurial-scm.org/D9649
