fix: genesis preseal: get it working

[aarshkshah1992]

Related Issues

Closes #12121

Need to merge and release Actors and go-state-types before merging this.

filecoin-project/builtin-actors#1553
filecoin-project/go-state-types#276

Proposed Changes

Additional Info

Checklist

Before you mark the PR ready for review, please make sure that:

• Commits have a clear commit message.
• PR title is in the form of of <PR type>: <area>: <change being made>
  • example: fix: mempool: Introduce a cache for valid signatures
  • PR type: fix, feat, build, chore, ci, docs, perf, refactor, revert, style, test
  • area, e.g. api, chain, state, mempool, multisig, networking, paych, proving, sealing, wallet, deps
• If the PR affects users (e.g., new feature, bug fix, system requirements change), update the CHANGELOG.md and add details to the UNRELEASED section.
• 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

[github-actions]

Some checks haven't completed yet

[rvagg]

pre-approval pending go-state-types release or some other magic to get this into a branch somewhere

[rvagg]

I've pushed [email protected] to this

[rvagg]

This requires #12144 merged into it - that should be reviewed separately and then this branch, with it, can be merged into master

[rvagg]

(don't squash merge this, too many unrelated things, rebase merge is good)