[BREAKING]: gRPC drop query field from LibrarySearchRequest

[alessio-perugini]

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What kind of change does this PR introduce?

Dropping a deprecated field in favour of search_args

What is the current behavior?

What is the new behavior?

Does this PR introduce a breaking change, and is titled accordingly?

Other information

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ba72833) 64.48% compared to head (6e14752) 64.50%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2388      +/-   ##
==========================================
+ Coverage   64.48%   64.50%   +0.02%     
==========================================
  Files         207      207              
  Lines       19593    19590       -3     
==========================================
+ Hits        12634    12637       +3     
+ Misses       5867     5863       -4     
+ Partials     1092     1090       -2     

Flag	Coverage Δ
unit	64.50% <ø> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
commands/lib/search.go	96.25% <ø> (-0.14%)	⬇️

... and 1 file with indirect coverage changes

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