Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/b342bb3..969e9b2

Rolling v8/buildtools: https://chromium.googlesource.com/chromium/src/buildtools/+log/82a4d60..fd3f3c1

Rolling v8/buildtools/third_party/libc++/trunk: https://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxx/+log/79a2e92..8fa8794

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/2bc697b..949bca8

Rolling v8/third_party/googletest/src: https://chromium.googlesource.com/external/github.com/google/googletest/+log/355d57d..255323c

TBR=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com

Change-Id: I75876b6b9e83f4d5866c0405bb7258f4c709b749
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2998385


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@{#75496}