[cipd] Update the client v2.6.5 => v2.6.7.

Adds support loading the machine-global config file to pick up
location of the admission plugin binary. See the bug for details.

BUG=1310363
R=iannucci@chromium.org
CC=akashmukherjee@google.com

Change-Id: I7a0cec6a994b79929e204766d32e0f9649b9dc8f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3736694Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Vadim Shtayura <vadimsh@chromium.org>

cipd_client_version

-git_revision:673f5ee1931bc72a2b3d4ac712a7f7bc541f089b
+git_revision:2fe24264d5b4585ecd16ba8e9bb582d8f4b20875

cipd_client_version.digests

 # This file was generated by
 #
 #  cipd selfupdate-roll -version-file cipd_client_version \
-#      -version git_revision:673f5ee1931bc72a2b3d4ac712a7f7bc541f089b
+#      -version git_revision:2fe24264d5b4585ecd16ba8e9bb582d8f4b20875
 #
 # Do not modify manually. All changes will be overwritten.
 # Use 'cipd selfupdate-roll ...' to modify.
 
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