comments(manager/config): add GRPCConfig struct for gRPC server confi…

[yxxhero]

…guration

Description

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 34.40%. Comparing base (fb5e1d7) to head (0f5318b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4044   +/-   ##
=======================================
  Coverage   34.40%   34.40%           
=======================================
  Files         343      343           
  Lines       40211    40211           
=======================================
  Hits        13835    13835           
  Misses      25461    25461           
  Partials      915      915           

Flag	Coverage Δ
unittests	34.40% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
manager/config/config.go	96.18% <ø> (ø)

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[gaius-qi]

LGTM

[Liam-Zhao]

LGTM