typing: disable processing of mercurial/upgrade_utils/actions.py
There was a recent regression in pytype that causes processing to stall and
consume memory, and it doesn't sound like it will be fixed any time soon.
Differential Revision: https://phab.mercurial-scm.org/D10273
local test passed
addgroupcopy test passed
clone test passed
lowlevelcopy test passed
slicing test passed
issnapshot test passed
findsnapshot test passed