args.set_at lead to a vulnerability in the past where the caller
(ignition) didn't expect the callee to overwrite the arguments.

The current usage doesn't look like an issue, but let's preemptively
remove these usages so that they don't lead to issues in the future.

Change-Id: I64e1f84ad1833b2b2f96cd7503bdde00f344404c
Bug: chromium:1268738
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3644965Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Stephen Röttger <sroettger@google.com>
Cr-Commit-Position: refs/heads/main@{#80641}