[PARENT] Wish list for the next serialization upgrade

[ggutoski]

The next time we make a breaking change to serialization we should include the following changes:

• [ ] #1574
• [ ] #1575
• [ ] #1604
• [ ] #1576
• [ ] Rename field Payload::raw_payload -> ns_payloads: https://github.com/EspressoSystems/espresso-sequencer/blob/8d4428d4804681524d45522ceee2ed427f96c70a/sequencer/src/block/full_payload/payload.rs#L40-L46

[nomaxg]

@jbearer is this a good candidate for something we can test for the first minor version bump?