[O2B-1437] Refactor gRPC service definition

[martinboulais]

I have a JIRA ticket

• branch and/or PR name(s) include(s) JIRA ID
• issue has "Fix version" assigned
• issue "Status" is set to "In review"
• PR labels are selected

Notable changes for users:

• N/A

Notable changes for developers:

• The binding of gRPC controllers has been sligtly refactored to make it easier to maintain

Changes made to the database:

• N/A

[codecov]

Codecov Report

Attention: Patch coverage is 95.65217% with 1 line in your changes missing coverage. Please review.

Project coverage is 44.82%. Comparing base (5779184) to head (f13b33c).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/server/gRPC/bindGRPCController.js	95.23%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1885      +/-   ##
==========================================
+ Coverage   44.80%   44.82%   +0.01%     
==========================================
  Files        1012     1012              
  Lines       17001    17005       +4     
  Branches     3064     3066       +2     
==========================================
+ Hits         7618     7622       +4     
  Misses       9383     9383              

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