typing: enable pytype processing on mercurial/upgrade_utils/actions.py
This was the suggested workaround for the pytype bug that caused this file to be
processed forever.
Differential Revision: https://phab.mercurial-scm.org/D10460
https://bz.mercurial-scm.org/1089
$ hg init
$ mkdir a
$ echo a > a/b
$ hg ci -Am m
adding a/b
$ hg rm a
removing a/b
$ hg ci -m m a
$ mkdir a b
$ echo a > a/b
$ hg ci -Am m
adding a/b
$ hg rm a
removing a/b
$ cd b
Relative delete:
$ hg ci -m m ../a
$ cd ..