feat: miner cli: sealing data-cid command

[magik6k]

Related Issues

Followup on #8557 making it possible to compute data CID on workers with lotus-miner CLI

Proposed Changes

• Add a lotus-miner sealing data-cid command.
• Add support for passing http readers as just urls over jsonrpc
• Handle padding automatically on the worker side in DataCid

[codecov]

Codecov Report

Merging #8715 (b53db68) into master (4b1bfa9) will decrease coverage by 0.10%.
The diff coverage is 7.79%.

@@            Coverage Diff             @@
##           master    #8715      +/-   ##
==========================================
- Coverage   40.92%   40.82%   -0.11%     
==========================================
  Files         687      688       +1     
  Lines       75971    76047      +76     
==========================================
- Hits        31090    31045      -45     
- Misses      39523    39648     +125     
+ Partials     5358     5354       -4     

Impacted Files	Coverage Δ
cmd/lotus-miner/sealing.go	37.13% <0.00%> (-9.93%)	⬇️
lib/httpreader/httpreader.go	0.00% <0.00%> (ø)
lib/rpcenc/reader.go	70.14% <33.33%> (-2.19%)	⬇️
extern/sector-storage/ffiwrapper/sealer_cgo.go	60.80% <100.00%> (+0.49%)	⬆️
itests/kit/blockminer.go	70.65% <0.00%> (-19.03%)	⬇️
cli/util.go	70.83% <0.00%> (-8.34%)	⬇️
chain/actors/builtin/miner/diff.go	52.94% <0.00%> (-5.89%)	⬇️
chain/exchange/peer_tracker.go	66.66% <0.00%> (-4.31%)	⬇️
node/hello/hello.go	63.63% <0.00%> (-3.41%)	⬇️
chain/stmgr/call.go	69.18% <0.00%> (-3.25%)	⬇️
... and 16 more