Update policy info for profile reporting

For profile reporting
 * if user is not affiliated, hide machine scope policy values.
 * Use user/profile cloud policy fetch timestamp instead of cbcm.

Note that, since we never upload multiple timestampe, the policy type
with timestampe is now deprecated.

Bug: b/323397683, b/327655258
Change-Id: Ic9989a331eaa8f151d07e25a84c683dbac83d529
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5333384
Reviewed-by: Igor Ruvinov <igorruvinov@chromium.org>
Commit-Queue: Owen Min <zmin@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1268098}