Revert (attempt 2) "[Product specifications] Add enterprise policy"

This reverts commit 259f96f2.

Reason for revert: Policy format and name incorrect for feature

This reland includes the changes to the network annotation so
the auditor passes.

Original change's description:
> [Product specifications] Add enterprise policy
>
> This patch adds the declaration for the enterprise policy for product
> specifications. The policy is not checked anywhere yet, but is needed
> for network annotation definitions in subsequent patches.
>
> Bug: b:325109916
> Change-Id: If3191068904cbf22449183db63d463d1426be2d1
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5297236


> Commit-Queue: Matthew Jones <mdjones@chromium.org>
> Reviewed-by: Pavol Marko <pmarko@chromium.org>
> Reviewed-by: Sébastien Lalancette <seblalancette@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1265934}

BYPASS_POLICY_COMPATIBILITY_CHECK=Policy never launched in-code

Bug: b:331846138, b:325109916
Change-Id: I8779bc7470401b1648342327e99a6337370a6bbb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5405992


Reviewed-by: Owen Min <zmin@chromium.org>
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1282148}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5425229


Reviewed-by: Chris Mullins <crmullins@chromium.org>
Auto-Submit: Matthew Jones <mdjones@chromium.org>
Reviewed-by: Nicolas Ouellet-Payeur <nicolaso@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1283975}