Force-inline the HandleScope constructor and destructor, and
add branch hints for two commonly-mispredicted branches. This
moves the overall JetStream2/cdjs score by roughly 4% on d8. I
suspect no change will be visible in chromium builds (with PGO).

Bug: v8:12196
Change-Id: I0fd7b67aa554876d2dad2d706b874df21dbb72e2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3270542
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77836}