Use chromeos, fuchsia, and google audit sources for cargo vet

Instead of using the aggregated one, use each of the original
sources. This will prevent a recursion if/when the google repo
begins aggregating chromium's audits.

R=lukasza@chromium.org

Bug: 1314345
Change-Id: I37f60fc64c54dcb15bfb356cb3fda02d0d49cbd5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5171009


Commit-Queue: danakj <danakj@chromium.org>
Auto-Submit: danakj <danakj@chromium.org>
Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1244103}