Revert "Roll Depot Tools from 6b19831e3cfb to 0699a53d8414 (1 revision)"

This reverts commit 428191c0804bc9cac9173e407222c71c2872897b.

Reason for revert: presubmit failing on linux and win builders

Bug: b:441973518
Original change's description:
> Roll Depot Tools from 6b19831e3cfb to 0699a53d8414 (1 revision)
>
> https://chromium.googlesource.com/chromium/tools/depot_tools.git/+log/6b19831e3cfb..0699a53d8414
>
> 2025-08-29 rop@google.com Add validation for CPEPrefix and Version fields.
>
> If this roll has caused a breakage, revert this CL and stop the roller
> using the controls here:
> https://autoroll.skia.org/r/depot-tools-chromium-autoroll
> Please CC chops-source-team@google.com on the revert to ensure that a human
> is aware of the problem.
>
> To file a bug in Chromium: https://bugs.chromium.org/p/chromium/issues/entry
>
> To report a problem with the AutoRoller itself, please file a bug:
> https://issues.skia.org/issues/new?component=1389291&template=1850622
>
> Documentation for the AutoRoller is here:
> https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
>
> Cq-Include-Trybots: luci.chromium.try:linux-utr-tester;luci.chromium.try:win-utr-tester
> Bug: chromium:438383649
> Tbr:
> Change-Id: I3a41db3c44add3e6b667f5e4ddf607f2617fbcb8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6899510
> Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
> Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
> Cr-Commit-Position: refs/heads/main@{#1508262}

Bug: chromium:438383649
Cq-Include-Trybots: luci.chromium.try:linux-utr-tester;luci.chromium.try:win-utr-tester
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I0e530d34c64d4caefaae4723831654ed05bd968e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6900577
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Anthony Cui <cuianthony@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1508522}