go/dependencies/etcd: update etcd with replace directive

[ptrus]

With updated nancy (done in #3283) we now use go list -json -m all to get the list of dependencies, which does correctly take replace directive into account. Therefore we can now replace the vulnerable etcd and remove the CVE ignores.

[codecov]

Codecov Report

Merging #3341 into master will decrease coverage by 0.15%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3341      +/-   ##
==========================================
- Coverage   65.44%   65.29%   -0.16%     
==========================================
  Files         371      371              
  Lines       33151    33151              
==========================================
- Hits        21697    21645      -52     
- Misses       8251     8315      +64     
+ Partials     3203     3191      -12     

Impacted Files	Coverage Δ
go/storage/mkvs/checkpoint/checkpointer.go	64.75% <0.00%> (-15.58%)	⬇️
go/consensus/tendermint/api/errors.go	90.00% <0.00%> (-10.00%)	⬇️
go/staking/api/grpc.go	51.26% <0.00%> (-7.57%)	⬇️
go/keymanager/client/client.go	81.41% <0.00%> (-6.20%)	⬇️
go/consensus/tendermint/apps/registry/query.go	76.47% <0.00%> (-5.89%)	⬇️
.../consensus/tendermint/apps/epochtime_mock/state.go	75.00% <0.00%> (-5.00%)	⬇️
go/consensus/tendermint/apps/staking/query.go	35.71% <0.00%> (-4.77%)	⬇️
go/storage/mkvs/lookup.go	72.63% <0.00%> (-4.22%)	⬇️
go/consensus/tendermint/registry/registry.go	70.24% <0.00%> (-3.91%)	⬇️
go/consensus/tendermint/apps/staking/state/gas.go	81.13% <0.00%> (-3.78%)	⬇️
... and 24 more

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