Opt out of C++23 when building in Chromium

See https://groups.google.com/a/google.com/g/chromium-dev-internal/c/22inHeL2Di8/m/P929_yUSEgAJ
for the announcement. Some of Skia's clients are C++20 only (e.g.
GCC 10.x support) for now.

Change-Id: I0f857e5575d042daef8a7e1a262934d18ee65f7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1140758
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Kaylee Lubick <kjlubick@google.com>
Auto-Submit: Kaylee Lubick <kjlubick@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>