Move Normalize into intl-objects.*
Move V8BreakIterator code to js-break-iterator*
Add heap-symbol for breakType of JSBreakIterator

Bug: v8:5751
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Id25af28770ae3c0b7716f4e3b602d4b040194a7d
Reviewed-on: https://chromium-review.googlesource.com/c/1293110
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56875}