Add support for node suspension due to runtime liveness failures

[kostko]

TODO

• Basic structures for tracking node liveness faults.
• Update the scheduler service to ignore suspended nodes when electing committees.
• Update the roothash service to track node liveness failure in the previous epoch.
• Support for slashing.
• Tests.

[Yawning]

This needs fixgenesis support, because we presumably want to enable this behavior.

[kostko]

My thinking was to leave it up to a runtime descriptor update.

[codecov]

Codecov Report

Merging #4470 (9bfcaf8) into master (b4de534) will decrease coverage by 0.10%.
The diff coverage is 77.63%.

@@            Coverage Diff             @@
##           master    #4470      +/-   ##
==========================================
- Coverage   68.87%   68.76%   -0.11%     
==========================================
  Files         421      424       +3     
  Lines       47174    47357     +183     
==========================================
+ Hits        32489    32566      +77     
- Misses      10697    10762      +65     
- Partials     3988     4029      +41     

Impacted Files	Coverage Δ
go/registry/api/runtime.go	43.94% <0.00%> (-0.57%)	⬇️
go/consensus/tendermint/apps/roothash/slashing.go	67.32% <41.17%> (-5.30%)	⬇️
go/consensus/tendermint/api/context.go	88.63% <50.00%> (ø)
go/consensus/tendermint/governance/governance.go	63.76% <50.00%> (ø)
go/consensus/tendermint/staking/staking.go	61.13% <50.00%> (ø)
go/consensus/tendermint/scheduler/scheduler.go	58.02% <60.00%> (ø)
go/consensus/tendermint/beacon/beacon.go	72.24% <62.50%> (ø)
go/consensus/tendermint/roothash/roothash.go	68.07% <63.63%> (+0.31%)	⬆️
go/consensus/tendermint/registry/registry.go	66.18% <65.00%> (-2.42%)	⬇️
...o/consensus/tendermint/apps/scheduler/scheduler.go	71.33% <73.68%> (+0.19%)	⬆️
... and 57 more

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