go/worker/p2p: Skip peer authentication for our own messages

[ptrus]

Fixes: #3318

[codecov]

Codecov Report

Merging #3319 into master will increase coverage by 0.20%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3319      +/-   ##
==========================================
+ Coverage   65.11%   65.31%   +0.20%     
==========================================
  Files         371      371              
  Lines       33044    33045       +1     
==========================================
+ Hits        21516    21584      +68     
+ Misses       8347     8268      -79     
- Partials     3181     3193      +12     

Impacted Files	Coverage Δ
go/worker/common/p2p/dispatch.go	74.52% <100.00%> (+0.24%)	⬆️
go/worker/compute/executor/committee/batch.go	63.63% <0.00%> (-18.19%)	⬇️
go/consensus/tendermint/api/errors.go	90.00% <0.00%> (-10.00%)	⬇️
go/consensus/tendermint/full/services.go	77.11% <0.00%> (-4.24%)	⬇️
go/consensus/tendermint/apps/staking/state/gas.go	81.13% <0.00%> (-3.78%)	⬇️
go/worker/common/committee/node.go	74.86% <0.00%> (-2.80%)	⬇️
go/consensus/tendermint/roothash/roothash.go	69.53% <0.00%> (-2.77%)	⬇️
go/storage/mkvs/cache.go	79.14% <0.00%> (-1.90%)	⬇️
go/storage/mkvs/iterator.go	80.57% <0.00%> (-1.44%)	⬇️
go/runtime/committee/client.go	76.41% <0.00%> (-1.42%)	⬇️
... and 31 more

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