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Similar to copyBetweenWindowsDriveToUsb, copyBetweenWindowsLocalToUsb
and other related tests are also flaky. Disable them all, but this time
only in debug builds.

TBR=austinct@chromium.org,noel@chromium.org

Bug: 1008909
Change-Id: I11f621367dd981787296544e30b8b532633cfdac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1860501Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#705617}