feat(f3): display the initial power table CID in the F3 manifest

[Stebalien]

Related Issues

This will make it easier to tell users how to set/verify F3_INITIAL_POWERTABLE_CID.

Proposed Changes

Display the initial power table CID in the lotus f3 manifest command output, and make sure it's set if available.

Checklist

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

• Commits have a clear commit message.
• PR title conforms with contribution conventions
• 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

[github-actions]

Please update the PR title to match https://github.com/filecoin-project/lotus/blob/master/CONTRIBUTING.md#pr-title-conventions

PR title now matches the required format.

[Stebalien]

@masih how have you been testing this? SSH into archioz?

[masih]

how have you been testing this? SSH into archioz?

this as in the CLI output?

[Stebalien]

this as in the CLI output?

I'm modifying the lotus f3 manifest command.

[Stebalien]

Yes, this as in the CLI output.

[masih]

I have been using mock data locally. In terms of live nodes, you can use butterflynet?