feat(mito): Ports InMemoryRowGroup from parquet crate

[evenyag]

I hereby agree to the terms of the GreptimeDB CLA

What's changed and what's your intention?

This PR copies InMemoryRowGroup from parquet crate and changes its visibility to pub.

This is the first step to implementing a row group level reader in our mito engine. There is an example that shows how to use try_new_with_row_groups() to read by row groups. Our row group level reader will use a similar approach.

A RowGroups implementation is necessary so we port it from the parquet crate. Now this PR doesn't change any logic.

I will introduce logical changes in the next PR so we don't need to care about the implementation of the InMemoryRowGroup.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.

Refer to a related PR or issue link (optional)

[codecov]

Codecov Report

Merging #2633 (82f3ebb) into develop (212ea2c) will decrease coverage by 0.50%.
Report is 2 commits behind head on develop.
The diff coverage is 0.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2633      +/-   ##
===========================================
- Coverage    85.15%   84.66%   -0.50%     
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  Files          740      741       +1     
  Lines       119840   119990     +150     
===========================================
- Hits        102055   101589     -466     
- Misses       17785    18401     +616     

[evenyag]

Well, there are some clippy warnings...... I will fix them in the next PR too as I'm not going to introduce additional changes.

[killme2008]

Let's move on!