go/oasis-node: Add storage namespace rename subcommand

[kostko]

No description provided.

[codecov]

Codecov Report

Merging #3908 (e3f8e36) into master (6adf3d2) will decrease coverage by 0.21%.
The diff coverage is 38.09%.

@@            Coverage Diff             @@
##           master    #3908      +/-   ##
==========================================
- Coverage   67.26%   67.04%   -0.22%     
==========================================
  Files         404      405       +1     
  Lines       41178    41266      +88     
==========================================
- Hits        27698    27668      -30     
- Misses       9562     9655      +93     
- Partials     3918     3943      +25     

Impacted Files	Coverage Δ
go/consensus/tendermint/api/api.go	83.11% <ø> (ø)
go/oasis-node/cmd/storage/storage.go	5.12% <4.34%> (-0.20%)	⬇️
go/consensus/tendermint/abci/mux.go	54.29% <20.00%> (-3.54%)	⬇️
go/storage/mkvs/db/badger/rename.go	45.00% <45.00%> (ø)
go/oasis-node/cmd/registry/runtime/runtime.go	54.43% <56.25%> (ø)
go/consensus/tendermint/apps/staking/auth.go	75.00% <62.50%> (-25.00%)	⬇️
go/oasis-node/cmd/common/metrics/disk.go	65.38% <0.00%> (-19.24%)	⬇️
go/oasis-node/cmd/common/metrics/resource.go	78.94% <0.00%> (-10.53%)	⬇️
go/consensus/tendermint/abci/state/state.go	54.54% <0.00%> (-9.10%)	⬇️
...nsensus/tendermint/apps/beacon/state/state_pvss.go	69.23% <0.00%> (-7.70%)	⬇️
... and 43 more

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