...for very large feedback vector indices.

Fixed: v8:13118
Change-Id: I38f1507ffe29e63ae58fd6436dffec7d0d610f95
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3791247Reviewed-by: Andreas Haas <ahaas@chromium.org>
Auto-Submit: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82110}