Collect batch fees into a single P2ID note

[Mirko-von-Leipzig]

The batch builder uses the fee-collector account to send tx fees to a configured wallet. The collection of this by the wallet is left to a separate service or app, and is not critical for now.

The sequencer CLI accepts --batch.builder.wallet-account-id as the recipient of batch-building fees. The wallet is managed separately; the sequencer does not need its account file or signing key. Local development networks and benchmarks send collected fees to an arbitrary non-existent account ID for now.

The fee-collector is now required by the sequencer in order to startup, as otherwise batch building won't work.

Batch selection reserves capacity for the collector transaction and its output note. The mempool distinguishes the selected batch ID from the proven batch ID because the appended transaction changes the ID. Batches without fee notes omit the collector transaction and keep their selected batch ID.

The batch builder submits the appended collector transaction to the validators before proving the batch.

Part of #2501.

Changelog

[[entry]]
scope       = "node"
impact      = "added"
description = "Aggregate transaction fees into a single P2ID note sent to the batch builder's wallet."

[[entry]]
scope       = "node"
impact      = "breaking"
description = "Require the batch builder's wallet account ID when starting the sequencer."

[PhilippGackstatter]

Looks good to me ito fee collector usage.