feat: miner: API/CLI to compute window-post

[magik6k]

Related Issues

Much better version of #7915

Proposed Changes

This PR adds a new ComputeWindowPoSt method and a lotus-miner proving compute window-post command which make it possible to manually trigger a window PoSt, which can be useful to verify changes in proving setup (e.g. PoSt worker working correctly / is fast enough)

Additional Info

Checklist

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

• All commits have a clear commit message.
• The 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, INTERFACE BREAKING CHANGE, CONSENSUS BREAKING, build, chore, ci, docs,perf, refactor, revert, style, test
  • area: api, chain, state, vm, data transfer, market, mempool, message, block production, multisig, networking, paychan, proving, sealing, wallet, deps
• This PR has tests for new functionality or change in behaviour
• If new user-facing features are introduced, clear usage guidelines and / or documentation updates should be included in https://lotus.filecoin.io or Discussion Tutorials.
• CI is green

[codecov]

Codecov Report

Merging #8389 (54cb55a) into master (a709a0a) will decrease coverage by 0.03%.
The diff coverage is 63.51%.

@@            Coverage Diff             @@
##           master    #8389      +/-   ##
==========================================
- Coverage   40.67%   40.63%   -0.04%     
==========================================
  Files         686      686              
  Lines       75262    75325      +63     
==========================================
- Hits        30613    30612       -1     
- Misses      39363    39396      +33     
- Partials     5286     5317      +31     

Impacted Files	Coverage Δ
api/api_storage.go	0.00% <ø> (ø)
cmd/lotus-miner/proving.go	25.92% <0.00%> (-1.98%)	⬇️
node/impl/storminer.go	24.10% <60.00%> (+0.25%)	⬆️
storage/wdpost_run.go	70.48% <90.00%> (+0.14%)	⬆️
node/builder_miner.go	95.07% <100.00%> (ø)
node/modules/storageminer.go	63.08% <100.00%> (+1.17%)	⬆️
chain/events/message_cache.go	87.50% <0.00%> (-12.50%)	⬇️
chain/exchange/client.go	52.96% <0.00%> (-8.48%)	⬇️
blockstore/api.go	24.00% <0.00%> (-8.00%)	⬇️
chain/events/events_called.go	83.90% <0.00%> (-4.40%)	⬇️
... and 20 more