Also introduce a helper for filling the arguments hints vector.

Bug: v8:7790
Change-Id: I89526f3d10bb4fc498a371d48d074254bd860cdc
Reviewed-on: https://chromium-review.googlesource.com/c/1433790Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59070}