feat: impl partitions and region_peers information schema

[killme2008]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

Adds two new information schemas to provide table partitions and regions distribution info:

• partitions just like MySQL partitions with an extral greptime_region_id column.
• greptime_region_peers just like tikv_region_peers https://docs.pingcap.com/tidb/stable/information-schema-tikv-region-peers

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)

#2931

[codecov]

Codecov Report

Attention: 375 lines in your changes are missing coverage. Please review.

Comparison is base (2a26c01) 85.53% compared to head (e0200d9) 84.92%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3278      +/-   ##
==========================================
- Coverage   85.53%   84.92%   -0.62%     
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  Files         872      874       +2     
  Lines      141967   142480     +513     
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- Hits       121434   120995     -439     
- Misses      20533    21485     +952     

[killme2008]

@WenyXu @fengjiachun PTAL

[fengjiachun]

Almost LGTM