Fixed goma_auth/ctl return code on Windows which was always zero.
Fixed other places where exit /b was used without %errorlevel%.

Change-Id: Ib0a647818c595f843a95762db023b111a447a66a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3532153Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Auto-Submit: Aleksey Khoroshilov <akhoroshilov@brave.com>
Commit-Queue: Josip Sokcevic <sokcevic@google.com>