Fixes for 17.gRPC

[RezaRahemtola]

Description

• SETUP updates to match newest versions
• Code & commands adapted with the newest protoc and go versions
• Typos and subject explanations

Changes include

• [x] Bugfix (non-breaking change that solves an issue)
• [x] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (change that is not backwards-compatible and/or changes current functionality)

Checklist

• [x] I have assigned this PR to myself
• [x] I have added at least 1 reviewer
• [x] I have tested this code
• [ ] I have added sufficient documentation in the code