Add debug info about the received GetOrchInfo Response and its latency

[leszko]

Context: https://linear.app/livepeer/issue/PS-977/high-jitter-during-playback

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 33.74900%. Comparing base (cfc7b6e) to head (4cc29e3).
Report is 9 commits behind head on master.

Additional details and impacted files

@@                 Coverage Diff                 @@
##              master       #3340         +/-   ##
===================================================
+ Coverage   33.74545%   33.74900%   +0.00355%     
===================================================
  Files            141         141                 
  Lines          37368       37370          +2     
===================================================
+ Hits           12610       12612          +2     
  Misses         24038       24038                 
  Partials         720         720                 

Files with missing lines	Coverage Δ
discovery/discovery.go	92.24806% <100.00000%> (+0.12208%)	⬆️

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Files with missing lines	Coverage Δ
discovery/discovery.go	92.24806% <100.00000%> (+0.12208%)	⬆️