Update HTTP Auth to use NetworkAnonymizationKey.

This key will be used to partition the network state in place of
NetworkIsolationKey. It will keep track of the top_frame_site,
the frame_site, an optional nonce and a bool indicating if the
frame_site is cross site from the top_frame_site. These properties
may be used to partition the network state and are needed to experiment
with different partition key schemes.

More information on origin of this key can be found here:
https://docs.google.com/document/d/1cWpMN8h5O_c3MoShloCb194crY46ADYq504
8Zugrkg/edit?usp=sharing&resourcekey=0-4Kz7ogvRTHbB2uD_BPZAPg

Bug: 1343856
Change-Id: I6e56d50630a5d802c95aece2fbd67d19e6709d79
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3923553
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Will Cassella <cassew@chromium.org>
Reviewed-by: Matt Menke <mmenke@chromium.org>
Commit-Queue: Brianna Goldstein <brgoldstein@google.com>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1056716}