[Semantic Variable Generator] Add font face generation to ts output.

While I'm here i also update the views generator code to use
std::optional instead of absl::optional, the test golden was already
updated in crrev.com/5185809.

Change-Id: I4a901cf5cb874ec18e8ded54099d3e15901c6455
Bug: b/301202780
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5199351
Commit-Queue: Zain Afzal <zafzal@google.com>
Reviewed-by: Sean Kau <skau@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1247864}