Currently, a streamed script which specifies 'use strict' is stored in
the isolate script cache with a key indicating that it is strict mode.
However, the keys should be based on the context executing the script,
not the content of the script, so that the next lookup can find the
entry without having to parse the script first.

Bug: v8:12668
Change-Id: Iaa76c00c431ad54a86ffd18b61cb4f67dc457b03
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3498220Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#79331}