go/common/crypto/hash: Add NewFrom and NewFromBytes functions

[kostko]

No description provided.

[codecov]

Codecov Report

Merging #2890 into master will increase coverage by 0.03%.
The diff coverage is 90.62%.

@@            Coverage Diff             @@
##           master    #2890      +/-   ##
==========================================
+ Coverage   67.74%   67.78%   +0.03%     
==========================================
  Files         352      352              
  Lines       34215    34188      -27     
==========================================
- Hits        23179    23173       -6     
+ Misses       8071     8056      -15     
+ Partials     2965     2959       -6     

Impacted Files	Coverage Δ
go/storage/mkvs/checkpoint/checkpoint.go	86.66% <0.00%> (+10.19%)	⬆️
go/worker/common/committee/group.go	80.59% <0.00%> (+0.91%)	⬆️
go/consensus/tendermint/abci/mux.go	69.97% <50.00%> (-0.60%)	⬇️
go/common/accessctl/accessctl.go	100.00% <100.00%> (ø)
go/common/crypto/hash/hash.go	84.61% <100.00%> (+2.00%)	⬆️
go/common/namespace.go	83.67% <100.00%> (-0.33%)	⬇️
go/common/node/node.go	70.00% <100.00%> (-0.54%)	⬇️
go/consensus/api/transaction/transaction.go	61.97% <100.00%> (-1.05%)	⬇️
.../consensus/tendermint/apps/registry/state/state.go	60.80% <100.00%> (+0.32%)	⬆️
go/consensus/tendermint/tendermint.go	66.24% <100.00%> (-0.05%)	⬇️
... and 55 more

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[Yawning]

Ahhhh, much nicer.