This reverts commit 6e780005.

Reason for revert: GN roll in v8/buildtools is causing an MB error - https://bugs.chromium.org/p/v8/issues/detail?id=11102

Original change's description:
> Update V8 DEPS.
>
> Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/92c40db..ef5fe70
>
> Rolling v8/buildtools: https://chromium.googlesource.com/chromium/src/buildtools/+log/98881a1..95fa84e
>
> Rolling v8/buildtools/linux64: git_revision:e002e68a48d1c82648eadde2f6aafa20d08c36f2..git_revision:f5f465b52e5df6d4de9fbe67cc79f1914ba4dbfc
>
> Rolling v8/third_party/aemu-linux-x64: uqYfh08DTmvjUgXl-HxNY1ptIb0KpyuY0I9MFaci9-AC..QCu1udNpe84cj5K2ZaTcAwnDUyjm45HgGJgtnoFkp7gC
>
> Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/888c272..c5bd411
>
> Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/655afeb..5bdfcd8
>
> Rolling v8/third_party/zlib: https://chromium.googlesource.com/chromium/src/third_party/zlib/+log/8cd0fc1..e84c9a3
>
> Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/4c43492..c37ae57
>
> Rolling v8/tools/luci-go: git_revision:1a022d3a4c50be4207ee93451255d71896416596..git_revision:576741d3eed0fa33971fb34cd823650e6f5b47fb
>
> Rolling v8/tools/luci-go: git_revision:1a022d3a4c50be4207ee93451255d71896416596..git_revision:576741d3eed0fa33971fb34cd823650e6f5b47fb
>
> Rolling v8/tools/luci-go: git_revision:1a022d3a4c50be4207ee93451255d71896416596..git_revision:576741d3eed0fa33971fb34cd823650e6f5b47fb
>
> TBR=machenbach@chromium.org,tmrts@chromium.org,v8-waterfall-sheriff@grotations.appspotmail.com
>
> Change-Id: I2395c6577e023d2aa48cf15b1f88e0207bd3f381
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2518492
> Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
> Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
> Cr-Commit-Position: refs/heads/master@{#70959}

TBR=machenbach@chromium.org,v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com,tmrts@chromium.org,v8-waterfall-sheriff@grotations.appspotmail.com

Change-Id: I2f86e73d2991a2d4617b67c6646d2e7b5a83b50b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2518672Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70960}