fix: daemon: avoid prompting to remove chain when noninteractive

[Stebalien]

Related Issues

See https://github.com/filecoin-project/lotus/pull/11579/files#r1453900324

Proposed Changes

1. Let the user specify --remove-existing-chain=false to avoid the prompt and fail if there's an existing chain.
2. Only prompt when interactive. Otherwise, don't remove the chain by-default.

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, market, 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