feat: support grpc for otlp trace and metrics

[fengys1996]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

This pr mainly change:

1. Add support for otlp's grpc protocol.
2. Add grpc auth middleware.
3. Add a GrpcServerBuilder.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR does not require documentation updates.

Refer to a related PR or issue link (optional)

[codecov]

Codecov Report

Attention: 95 lines in your changes are missing coverage. Please review.

Comparison is base (122b472) 85.71% compared to head (2272a2c) 85.14%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3105      +/-   ##
==========================================
- Coverage   85.71%   85.14%   -0.58%     
==========================================
  Files         812      815       +3     
  Lines      132958   133218     +260     
==========================================
- Hits       113964   113425     -539     
- Misses      18994    19793     +799     

[shuiyisong]

Rest LGTM