refactor(batch): remove DataChunkRef

[TennyZhuang]

Signed-off-by: TennyZhuang zty0826@gmail.com

What's changed and what's your intention?

PLEASE DO NOT LEAVE THIS EMPTY !!!

Columns inside DataChunk are already wrapped with Arc, so it's useless to use Arc.

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests

Refer to a related PR or issue link (optional)

[codecov]

Codecov Report

Merging #2143 (c0d8b8c) into main (10f0d2e) will increase coverage by 0.03%.
The diff coverage is 90.47%.

@@            Coverage Diff             @@
##             main    #2143      +/-   ##
==========================================
+ Coverage   70.54%   70.57%   +0.03%     
==========================================
  Files         645      645              
  Lines       81703    81720      +17     
==========================================
+ Hits        57637    57676      +39     
+ Misses      24066    24044      -22     

Flag	Coverage Δ
rust	70.57% <90.47%> (+0.03%)	⬆️

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

Impacted Files	Coverage Δ
src/common/src/array/mod.rs	70.67% <ø> (ø)
src/batch/src/executor/order_by.rs	82.76% <33.33%> (ø)
src/batch/src/executor/merge_sort_exchange.rs	75.34% <100.00%> (ø)
src/batch/src/executor/test_utils.rs	91.66% <100.00%> (ø)
src/batch/src/executor2/limit.rs	91.70% <100.00%> (+0.03%)	⬆️
src/batch/src/executor2/top_n.rs	80.29% <100.00%> (ø)
src/common/src/array/data_chunk.rs	89.74% <100.00%> (ø)
src/common/src/util/sort_util.rs	82.75% <100.00%> (ø)
src/meta/src/hummock/mock_hummock_meta_client.rs	44.30% <0.00%> (-5.07%)	⬇️
src/storage/src/hummock/local_version_manager.rs	89.02% <0.00%> (-2.04%)	⬇️
... and 6 more

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[fuyufjh]

LGTM