feat(java-binding): store java binding row in iter

[wenym1]

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What's changed and what's your intention?

Previously, in our java binding iterator, the next method returns newly allocated row pointer. This is bad design because we should the cost of allocation is considerable, and more importantly, it is very easy for users to forget to release the row pointer.

In this PR, we change to store the row inside the java binding iterator. In this way, we don't have to allocate a new row in each next call, and we don't have to carefully remember to close it.

After this PR, the SinkRow is not AutoClosable any more, and we don't have to wrap the rows returned from next with a try-with-resource to release the row.

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
• My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future).
• All checks passed in ./risedev check (or alias, ./risedev c)
• My PR changes performance-critical code. (Please run macro/micro-benchmarks and show the results.)

• My PR contains critical fixes that are necessary to be merged into the latest release. (Please check out the details)

Documentation

• My PR needs documentation updates. (Please use the Release note section below to summarize the impact on users)

Release note

If this PR includes changes that directly affect users or other significant modifications relevant to the community, kindly draft a release note to provide a concise summary of these changes. Please prioritize highlighting the impact these changes will have on users.

[codecov]

Codecov Report

Merging #12533 (867433e) into main (dc6865c) will decrease coverage by 0.01%.
Report is 3 commits behind head on main.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main   #12533      +/-   ##
==========================================
- Coverage   69.31%   69.31%   -0.01%     
==========================================
  Files        1469     1469              
  Lines      241031   241009      -22     
==========================================
- Hits       167073   167048      -25     
- Misses      73958    73961       +3     

Flag	Coverage Δ
rust	69.31% <0.00%> (-0.01%)	⬇️

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

Files	Coverage Δ
src/jni_core/src/macros.rs	100.00% <ø> (ø)
src/jni_core/src/hummock_iterator.rs	0.00% <0.00%> (ø)
src/jni_core/src/stream_chunk_iterator.rs	0.00% <0.00%> (ø)
src/jni_core/src/lib.rs	1.14% <0.00%> (-0.01%)	⬇️

... and 3 files with indirect coverage changes

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[hzxa21]

LGTM