Expose the query GRPC port

[iblancasa]

Resolves #513

[codecov-commenter]

Codecov Report

Merging #517 (03535b1) into main (90851aa) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #517      +/-   ##
==========================================
+ Coverage   78.68%   78.73%   +0.04%     
==========================================
  Files          60       60              
  Lines        4519     4529      +10     
==========================================
+ Hits         3556     3566      +10     
  Misses        809      809              
  Partials      154      154              

Flag	Coverage Δ
unittests	78.73% <100.00%> (+0.04%)	⬆️

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Impacted Files	Coverage Δ
internal/manifests/queryfrontend/query_frontend.go	90.90% <100.00%> (+0.24%)	⬆️