p2p: retry send once on relay errors

[corverroos]

Retry sends once on relay errors. This should solve 99% of the stream reset warnings of infosync and peerinfo protocols when using relay connections. This only now became an issue since these protocols do send-receive (other protocols did send and receive separately).

category: bug
ticket: none

[codecov]

Codecov Report

Base: 53.54% // Head: 54.06% // Increases project coverage by +0.51% 🎉

Coverage data is based on head (dfe74ed) compared to base (0f229c9).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1465      +/-   ##
==========================================
+ Coverage   53.54%   54.06%   +0.51%     
==========================================
  Files         147      147              
  Lines       18673    18683      +10     
==========================================
+ Hits         9999    10101     +102     
+ Misses       7297     7210      -87     
+ Partials     1377     1372       -5     

Impacted Files	Coverage Δ
p2p/sender.go	71.84% <100.00%> (+28.83%)	⬆️
app/app.go	62.69% <0.00%> (+0.76%)	⬆️
core/priority/prioritiser.go	62.55% <0.00%> (+1.23%)	⬆️
app/vmock.go	75.64% <0.00%> (+1.55%)	⬆️
p2p/ping.go	2.18% <0.00%> (+2.18%)	⬆️
core/qbft/qbft.go	82.46% <0.00%> (+10.02%)	⬆️
dkg/transport.go	66.66% <0.00%> (+12.96%)	⬆️

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