Remove GRPC Setting Service API

[umbynos]

Describe the request

Remove GRPC Setting Service API in favor of commands

Describe the current behavior

No change in behavior, just an API refactoring

Arduino CLI version

nightly

Operating system

N/A

Operating system version

n/a

Additional context

No response

Issue checklist

• I searched for previous requests in the issue tracker
• I verified the feature was still missing when using the nightly build
• My request contains all necessary details