[BACKPORT/22.2.x] runtime/src/protocol: Deserialize unknown rhp messages as invalid

[peternose]

Backport 5094.

[codecov]

Codecov Report

Merging #5096 (bb49db7) into stable/22.2.x (e79d32a) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@                Coverage Diff                @@
##           stable/22.2.x    #5096      +/-   ##
=================================================
- Coverage          66.66%   66.62%   -0.04%     
=================================================
  Files                471      471              
  Lines              51643    51643              
=================================================
- Hits               34427    34409      -18     
- Misses             12975    12994      +19     
+ Partials            4241     4240       -1     

Impacted Files	Coverage Δ
go/roothash/api/sanity_check.go	40.00% <0.00%> (-20.00%)	⬇️
go/roothash/api/api.go	76.78% <0.00%> (-8.93%)	⬇️
go/consensus/tendermint/apps/staking/auth.go	62.96% <0.00%> (-7.41%)	⬇️
go/scheduler/api/api.go	53.26% <0.00%> (-6.53%)	⬇️
go/worker/common/p2p/dispatch.go	71.52% <0.00%> (-5.56%)	⬇️
go/common/grpc/auth/auth.go	94.73% <0.00%> (-5.27%)	⬇️
go/governance/api/api.go	75.20% <0.00%> (-4.96%)	⬇️
go/consensus/tendermint/apps/beacon/state/state.go	66.66% <0.00%> (-4.31%)	⬇️
go/storage/mkvs/insert.go	87.75% <0.00%> (-4.09%)	⬇️
go/consensus/tendermint/full/light.go	52.85% <0.00%> (-2.86%)	⬇️
... and 30 more

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