This is a reland of d3bfd23c

Don't modify cwd for paths other than depot_tools.

Original change's description:
> presubmit_canned_checks: Run pylint on parent directory for depot_tools.
>
> On Windows, scripts on the current directory take precedence over PATH.
> When pylint.bat calls vpython, it executes the vpython of the depot_tools
> under test instead of the one in the bot.
> As a workaround, run the tests from the parent directory instead.
>
> Change-Id: I7fa3f5b268df516194063ff39907ada18f7ef544
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1994216
> Reviewed-by: Anthony Polito <apolito@google.com>
> Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>

No-Presubmit: True
Change-Id: I4236ec17b2642ed7f53844af532ec1f5234b80d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1995783
Commit-Queue: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Anthony Polito <apolito@google.com>