Make --turboprop imply a lower interrupt budget (10 * k).

Bug: v8:9684
Change-Id: I6e4bac1a77755e5bc8c7433503fe985cbc6db7ff
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1928859Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65101}