Propagate direct HTTP announces to `dev` environment for testing

[Masih H. Derkani]

Direct announcements hit prod endpoint, which land on prod assigner. assigners flood publish direct announces over gossipsub. But none of the prod nodes are peered with dev nodes or vice versa. Therefore, dev nodes do not discover direct http announces made to prod.

Ideally, we want to also receive direct announces in dev (either directly or indirectly) for testing purposes.

Peering any one of the nodes with dev assigner should resolve this.

Note that assigners do not expose a public libp2p port and run on separate VPCs.

An option forward is to:

• expose dev assigner libp2p endpoint with a stable dns name.
• peer prod assigner to dev assigner.

This should result in assigner receiving direct announcements over gossipsub flood publish, which then should trigger assignments to the nodes it is responsible for.

[Andrew Gillis]

Handled in PR #1921