Apply upgrade proposals directly from governance consensus application

[kostko]

This should make it more robust in light of fast sync as otherwise the worker
could miss upgrade events in certain edge cases.

[codecov]

Codecov Report

Merging #3870 (c9913a2) into master (26e6168) will decrease coverage by 0.05%.
The diff coverage is 42.22%.

@@            Coverage Diff             @@
##           master    #3870      +/-   ##
==========================================
- Coverage   67.20%   67.15%   -0.06%     
==========================================
  Files         404      404              
  Lines       41516    41445      -71     
==========================================
- Hits        27902    27832      -70     
  Misses       9658     9658              
+ Partials     3956     3955       -1     

Impacted Files	Coverage Δ
go/consensus/tendermint/api/api.go	83.11% <ø> (ø)
go/oasis-node/cmd/node/node.go	54.01% <ø> (-1.31%)	⬇️
go/consensus/tendermint/abci/mux.go	57.29% <28.57%> (+0.53%)	⬆️
...consensus/tendermint/apps/governance/governance.go	63.01% <32.25%> (-3.94%)	⬇️
go/consensus/tendermint/full/full.go	64.46% <100.00%> (-0.69%)	⬇️
go/consensus/tendermint/full/helpers.go	100.00% <100.00%> (ø)
go/consensus/tendermint/apps/governance/query.go	83.33% <0.00%> (-16.67%)	⬇️
go/consensus/tendermint/apps/beacon/state/state.go	68.25% <0.00%> (-6.35%)	⬇️
go/consensus/tendermint/apps/beacon/genesis.go	62.50% <0.00%> (-6.25%)	⬇️
go/consensus/tendermint/apps/registry/query.go	76.47% <0.00%> (-5.89%)	⬇️
... and 36 more

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