Currently the --single-generation flags disables inline allocations
and forces all allocations to go via runtime where they are redirected
to the old generation.

This patch implements the young to old redirection in CSA and TF.

Bug: v8:11644
Change-Id: Ie945ba684fb0f41d5414a05be2f25245d4869d6c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2839010Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74121}