errors: respect ui.detailed-exit-code in chg
This fixes `test-globalopts.t`, which has been failing since
db5dddb38f5b (errors: raise InputError on early parse error in
dispatch, 2020-11-23).
Differential Revision: https://phab.mercurial-scm.org/D9630
# Files that just need to be migrated to the formatter.
# Do not add new files here!
mercurial/cext/manifest.c
mercurial/cext/osutil.c
# Vendored code that we should never format:
syntax: glob
contrib/python-zstandard/**.c
contrib/python-zstandard/**.h
hgext/fsmonitor/pywatchman/**.c
mercurial/thirdparty/**.c
mercurial/thirdparty/**.h