fix(otlp): replace otlp trace attr type from string to jsonb

[paomian]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

#4873

What's changed and what's your intention?

• replace otlp trace attr type from string to jsonb
• change default trace table name and specify the trace table name via the header

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.

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[codecov]

Codecov Report

Attention: Patch coverage is 75.91241% with 66 lines in your changes missing coverage. Please review.

Project coverage is 83.82%. Comparing base (cccd25d) to head (6e9d75f).
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4918      +/-   ##
==========================================
- Coverage   84.14%   83.82%   -0.33%     
==========================================
  Files        1141     1143       +2     
  Lines      211063   211918     +855     
==========================================
+ Hits       177606   177645      +39     
- Misses      33457    34273     +816     

[sunng87]

we need to add a test case for trace table name customization

[shuiyisong]

Rest LGTM

[shuiyisong]

Also is this a breaking change?

[paomian]

Also is this a breaking change?

Currently trace is not open to the public. So these changes are fine.