rust-cpython: make `NonNormalEntires` iterable to fix `fsmonitor` (
issue6276)
This fixes a bug when using `fsmonitor` that tries to iterate on the non normal
set, by adding a shared iterator interface.
Differential Revision: https://phab.mercurial-scm.org/D8143
Added signature for changeset
6d121acbb82e
Added tag 5.3.1 for changeset
6d121acbb82e