This reverts commit c83fae06.

Reason for revert: the CL that required the revert of this CL was relanded.

https://chromium-review.googlesource.com/c/v8/v8/+/1154247

Original change's description:
> Revert "[Intl] Move Number.toLocaleString from js to c++"
>
> This reverts commit a895f01a.
>
> Reason for revert: Needed for other revert:
> https://chromium-review.googlesource.com/c/v8/v8/+/1152767
>
> Original change's description:
> > [Intl] Move Number.toLocaleString from js to c++
> >
> >
> > Bug: v8:7960
> > Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
> > Change-Id: I21a524b620e210cce625a1a00e68c0b687187087
> > Reviewed-on: https://chromium-review.googlesource.com/1144659
> > Commit-Queue: Frank Tang <ftang@chromium.org>
> > Reviewed-by: Jungshik Shin <jshin@chromium.org>
> > Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#54741}
>
> TBR=jshin@chromium.org,gsathya@chromium.org,bstell.chromium.org@gmail.com,ftang@chromium.org
>
> Change-Id: I060fa2834dde5e1b4cc71923cc066d97bce2a33b
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: v8:7960
> Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
> Reviewed-on: https://chromium-review.googlesource.com/1152787
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54746}

TBR=machenbach@chromium.org,jshin@chromium.org,gsathya@chromium.org,bstell.chromium.org@gmail.com,ftang@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: v8:7960
Change-Id: I7a7a67db77b9b5a181f1751a03186eb7e8b271a0
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Reviewed-on: https://chromium-review.googlesource.com/1154248
Commit-Queue: Jungshik Shin <jshin@chromium.org>
Reviewed-by: Jungshik Shin <jshin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54774}