Avoid TOCTOU in UnzipUpdaterHistoryFilesImpl

On some platforms, the temporary directory created by ScopedTempDir is
in a location accessible by some sandboxed processes. Avoid possible
sandbox escapes leveraging the UnzipUpdaterHistoryFilesImpl
functionality which replace the "input.zip" with a symbolic link.

Fixed: 521485244
Change-Id: Ic7e64f34f5f6f6740ca456b67a2ad18a6a6a6964
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7911844
Auto-Submit: Noah Rose Ledesma <noahrose@google.com>
Commit-Queue: Sorin Jianu <sorin@chromium.org>
Reviewed-by: Sorin Jianu <sorin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1644216}