[text-spacing-trim] Support `space-all`

This patch supports `text-spacing-trim: space-all`.

The `chws` feature is on by default for Chromium, so the test
fails without the flag, but when the runtime flag is on, it
disables the `chws` feature as well, in addition not applying
the `HanKerning` algorithm.

This patch has no behavior changes as changes are under a
runtime flag.

Bug: 1463891
Change-Id: Ia88744cec376c376da9f54e6aba777309cbb4982
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4904863
Auto-Submit: Koji Ishii <kojii@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Commit-Queue: Lingqi Chi <lingqi@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Reviewed-by: Lingqi Chi <lingqi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1203854}