go/consensus/tendermint: Fix early GetStatus with initial height > 1

[kostko]

Fixes #3481

[codecov]

Codecov Report

Merging #3503 (98d314d) into master (f224082) will decrease coverage by 0.15%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3503      +/-   ##
==========================================
- Coverage   66.56%   66.40%   -0.16%     
==========================================
  Files         373      373              
  Lines       33940    33943       +3     
==========================================
- Hits        22592    22541      -51     
- Misses       8074     8144      +70     
+ Partials     3274     3258      -16     

Impacted Files	Coverage Δ
go/consensus/tendermint/full/full.go	62.31% <100.00%> (-0.12%)	⬇️
go/consensus/tendermint/epochtime/epochtime.go	85.18% <0.00%> (-7.41%)	⬇️
go/staking/api/grpc.go	52.75% <0.00%> (-6.30%)	⬇️
go/worker/common/committee/node.go	72.06% <0.00%> (-5.59%)	⬇️
go/consensus/tendermint/apps/staking/query.go	35.71% <0.00%> (-4.77%)	⬇️
go/consensus/tendermint/full/services.go	77.11% <0.00%> (-4.24%)	⬇️
go/storage/mkvs/lookup.go	72.63% <0.00%> (-4.22%)	⬇️
go/consensus/tendermint/abci/mux.go	58.33% <0.00%> (-3.41%)	⬇️
go/consensus/tendermint/abci/state.go	69.38% <0.00%> (-3.41%)	⬇️
go/storage/api/root_cache.go	75.00% <0.00%> (-3.34%)	⬇️
... and 32 more

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