Add --unproven flag to the sectors list command

[magik6k]

This is #7263, but this time opened to the right branch

[codecov]

Codecov Report

Merging #7308 (8612d1e) into master (1ce7c25) will increase coverage by 0.00%.
The diff coverage is 18.75%.

@@           Coverage Diff           @@
##           master    #7308   +/-   ##
=======================================
  Coverage   39.14%   39.14%           
=======================================
  Files         614      614           
  Lines       64989    64997    +8     
=======================================
+ Hits        25437    25444    +7     
+ Misses      35145    35144    -1     
- Partials     4407     4409    +2     

Impacted Files	Coverage Δ
cmd/lotus-miner/sectors.go	11.21% <18.75%> (-0.09%)	⬇️
extern/sector-storage/sched_resources.go	75.00% <0.00%> (-9.38%)	⬇️
chain/events/observer.go	71.64% <0.00%> (-6.72%)	⬇️
chain/exchange/peer_tracker.go	66.66% <0.00%> (-4.31%)	⬇️
extern/storage-sealing/fsm.go	57.42% <0.00%> (-1.61%)	⬇️
chain/store/store.go	64.37% <0.00%> (-0.71%)	⬇️
chain/messagepool/messagepool.go	56.93% <0.00%> (-0.62%)	⬇️
node/impl/full/chain.go	14.16% <0.00%> (-0.58%)	⬇️
chain/messagepool/selection.go	80.12% <0.00%> (-0.41%)	⬇️
chain/sync.go	64.94% <0.00%> (-0.34%)	⬇️
... and 10 more

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[magik6k]

(Merging as #7263 was approved)