go/consensus/tendermint: Fix liveness tracking for primary+backup

[kostko]

In case a node is both primary and backup and doesn't submit a commit
but there was no discrepancy, the node should still be treated as
failed.

This needs to wait until we release 22.2.x.

[codecov]

Codecov Report

Merging #4798 (ed32a55) into master (7d5d0bb) will decrease coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4798      +/-   ##
==========================================
- Coverage   66.78%   66.73%   -0.06%     
==========================================
  Files         471      471              
  Lines       51613    51614       +1     
==========================================
- Hits        34472    34446      -26     
- Misses      12919    12927       +8     
- Partials     4222     4241      +19     

Impacted Files	Coverage Δ
go/common/version/version.go	80.26% <ø> (ø)
go/consensus/tendermint/apps/roothash/roothash.go	73.73% <100.00%> (-1.21%)	⬇️
go/roothash/api/sanity_check.go	60.00% <0.00%> (-8.00%)	⬇️
go/common/grpc/auth/auth.go	94.73% <0.00%> (-5.27%)	⬇️
go/storage/mkvs/remove.go	85.85% <0.00%> (-4.05%)	⬇️
go/common/sgx/common.go	66.01% <0.00%> (-3.89%)	⬇️
go/consensus/tendermint/full/services.go	74.81% <0.00%> (-3.71%)	⬇️
go/common/sgx/aesm/aesm.go	44.13% <0.00%> (-3.29%)	⬇️
go/consensus/tendermint/abci/state.go	72.85% <0.00%> (-2.86%)	⬇️
...nsensus/tendermint/apps/keymanager/transactions.go	52.77% <0.00%> (-2.78%)	⬇️
... and 33 more

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