Add a batch builder collection account to genesis

[Mirko-von-Leipzig]

Add the batch builder's collection account to genesis.

This is an immutable pass-through account which aggregates fee notes into a single p2id note. The idea is that the batch builder uses this account to transform fees into a p2id note for its own wallet account.

Because the pass through account is immutable, it can be used concurrently. In the future we will instead have multiple batch builder accounts to enable concurrency, but for now this is simpler.

The pass through account requires auth because we don't want our batch builder account to be associated with anonymisers.

Part of #2501.

Changelog

[[entry]]
scope       = "validator"
impact      = "added"
description = "Add batch builder's collection account to genesis."