gRPC: Added CheckForArduinoCLIUpdates RPC call

[cmaglie]

Please check if the PR fulfills these requirements

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• The PR has no duplicates (please search among the Pull Requests
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• The PR follows
  our contributing guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• UPGRADING.md has been updated with a migration guide (for breaking changes)
• configuration.schema.json updated if new parameters are added.

What kind of change does this PR introduce?

Adds a gRPC call CheckForArduinoCLIUpdates.

What is the current behavior?

No changes.

What is the new behavior?

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

No

Other information

This will be part of a bigger refactoring #2565

[alessio-perugini]

I like that 🆒

[codecov]

Codecov Report

Attention: Patch coverage is 24.27184% with 78 lines in your changes are missing coverage. Please review.

Project coverage is 69.47%. Comparing base (af85d57) to head (a54ed9e).

Files	Patch %	Lines
commands/updatecheck/check_for_updates.go	8.47%	54 Missing ⚠️
internal/cli/cli.go	62.50%	11 Missing and 1 partial ⚠️
internal/cli/version/version.go	0.00%	9 Missing ⚠️
commands/daemon/daemon.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2573      +/-   ##
==========================================
- Coverage   69.54%   69.47%   -0.08%     
==========================================
  Files         206      207       +1     
  Lines       20264    20283      +19     
==========================================
- Hits        14093    14092       -1     
- Misses       5054     5077      +23     
+ Partials     1117     1114       -3     

Flag	Coverage Δ
unit	69.47% <24.27%> (-0.08%)	⬇️

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