txn: make load data transactional

[ekexium]

What problem does this PR solve?

Issue Number: ref #49078

What changed and how does it work?

Make `LOAD DATA` statements behave normally in a transaction.
Previously the `LOAD DATA` statement commits the current transaction, start a new transaction for its own use and commit it immediately after the statement.
The PR fixes the issue and make `LOAD DATA` behave like other normal DMLs. It doesn't create txn for its own and respects the rollback or commit action of its surrounding transaction.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

Make `LOAD DATA` statements behave normally in a transaction.
Previously the `LOAD DATA` statement commits the current transaction, start a new transaction for its own use and commit it immediately after the statement.
The PR fixes the issue and make `LOAD DATA` behave like other normal DMLs. It doesn't create txn for its own and respects the rollback or commit action of its surrounding transaction.

[ti-chi-bot]

Skipping CI for Draft Pull Request.
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[codecov]

Codecov Report

Merging #49079 (821df04) into master (074af10) will increase coverage by 0.7073%.
Report is 4 commits behind head on master.
The diff coverage is 20.1388%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #49079        +/-   ##
================================================
+ Coverage   70.9977%   71.7051%   +0.7073%     
================================================
  Files          1368       1418        +50     
  Lines        399517     432866     +33349     
================================================
+ Hits         283648     310387     +26739     
- Misses        96068     103361      +7293     
+ Partials      19801      19118       -683     

Flag	Coverage Δ
integration	43.7927% <6.1538%> (?)
unit	71.0256% <72.5000%> (+0.0279%)	⬆️

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

Components	Coverage Δ
dumpling	53.9663% <ø> (ø)
parser	∅ <ø> (∅)
br	47.7824% <ø> (-5.1124%)	⬇️

[ekexium]

/test all

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[cfzjywxk]

LGTM

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-12-15 06:05:29.040751593 +0000 UTC m=+595420.077978520: ☑️ agreed by zyguan.
• 2023-12-15 07:34:36.605862879 +0000 UTC m=+600767.643089809: ☑️ agreed by cfzjywxk.

[cfzjywxk]

@lance6716 @you06
PTAL

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[lance6716]

/retest

[lance6716]

/hold

wait for @you06 's review

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cfzjywxk, lance6716, you06, zyguan

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[lance6716]

/unhold