fix(splitstore): merry christmas lotus! Remove ~120 G from lotus datastore

[ZenGround0]

Related Issues

#10554

Proposed Changes

As part of the christmas spirit I wanted to do something that everyone in the network would see as a gift. This year I decided to get us the gift of 100 fewer gigs in the lotus datastore

Basically today we hold onto two copies of the state. One original in the cold store and one hot copy. As far as I can tell there is zero reason to do this.

This change puts the snapshot directly into the hotstore since most of us are syncing from snapshots now. This has an added benefit that the splitstore does not need to do a warmup chain traversal to populate the hotstore anymore.

Additional Info

As far as I can tell the original add snapshot to cold then warmup hot was meant to fit the broader pattern of the splitstore working with existing large datastores. However in today's environment the default and most commonly used pattern of operation is to sync from a snapshot and run in discard mode.

Somebody tell me if this breaks something? I'm running pretty good on mainnet right now.

Checklist

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• Commits have a clear commit message.
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• Update CHANGELOG.md or signal that this change does not need it per contribution conventions
• New features have usage guidelines and / or documentation updates in
  • Lotus Documentation
  • Discussion Tutorials
• Tests exist for new functionality or change in behavior
• CI is green