Added BoardIdentify gRPC call.

[cmaglie]

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• Tests for the changes have been added (for bug fixes / features)
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• configuration.schema.json updated if new parameters are added.

What kind of change does this PR introduce?

Adds the BoardIdentify gRPC call, this function performs the board identification based on the given "upload port properties".

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

Attention: Patch coverage is 67.27273% with 54 lines in your changes missing coverage. Please review.

Project coverage is 67.66%. Comparing base (7782c89) to head (1432af1).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
commands/service_board_identify.go	67.40%	31 Missing and 13 partials ⚠️
commands/service_board_list.go	66.66%	6 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2794      +/-   ##
==========================================
+ Coverage   67.59%   67.66%   +0.06%     
==========================================
  Files         238      239       +1     
  Lines       22374    22378       +4     
==========================================
+ Hits        15123    15141      +18     
+ Misses       6062     6045      -17     
- Partials     1189     1192       +3     

Flag	Coverage Δ
unit	67.66% <67.27%> (+0.06%)	⬆️

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