Not all 2 or 3 letter language codes are canonical. Some of them need
to be canonicalized.

Specifically, exclude {jw,ji,iw,in} and all three-letter codes from the
fast path except for 'fil'.

{jw,ji,iw,in} are deprecated ISO 639 codes for
{Javanese, Yiddish, Hebrew, Indonesian}. They should be
canonicalized to {jv,yi,he,id}. So, do not return early
in the fast path, but pass it down to the full canonicalization.

In addition, there are 70+ deprecated 3-letter codes that need to be
replaced by their modern equivalents. Instead of checking and replacing
in v8, just pass them to ICU to handle.

Along with the following ICU change, two more tests will pass.

  https://chromium-review.googlesource.com/c/chromium/deps/icu/+/1026797

These two tests still fail because of the disagreement between ICU and the test
expectations about 5 grandfathered tags with no preferred value (e.g.
i-default, zh-min, cel-gaulish).

  'intl402/Intl/getCanonicalLocales/canonicalized-tags'
  'intl402/Intl/getCanonicalLocales/preferred-grandfathered'

Bug: v8:5693, v8:7669
Test: test262/intl402/language-tags-canonicalized.js
Test: test262/intl402/Intl/preferred-variants.js
Test: intl/general/language_tags_with_preferred_values.js
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ide7e9c90ac046859604c7b71c641f84ce9c64be5
Reviewed-on: https://chromium-review.googlesource.com/1023379Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Jungshik Shin <jshin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52823}