prepare, stmtctx: fix the issue that errors/warnings in parse stage are not cleaned or reported

[YangKeao]

What problem does this PR solve?

Issue Number: close #59275, close #59132

Problem Summary:

1. The errors/warnings are not cleaned because the stmtctx is not reset when Parse returns error.
2. When Parse returns error, the error is not appended to the stmtctx for the PREPARE binary protocol.

What changed and how does it work?

1. Reset the warnings in stmtctx if Parse returns error.
2. Append the error for the PREPARE binary protocol.

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

Fix the issue that errors/warnings in parse stage are not cleaned or reported

[YangKeao]

/check-issue-triage-complete

[ti-chi-bot]

@YangKeao: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci-tidb/mysql-test	0a83390	link	true	/test mysql-test

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.5206%. Comparing base (6673923) to head (0a83390).
Report is 17 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #59276        +/-   ##
================================================
+ Coverage   73.0454%   73.5206%   +0.4751%     
================================================
  Files          1689       1689                
  Lines        466983     467137       +154     
================================================
+ Hits         341110     343442      +2332     
+ Misses       104893     102731      -2162     
+ Partials      20980      20964        -16     

Flag	Coverage Δ
integration	42.9424% <68.7500%> (?)
unit	72.2988% <100.0000%> (+0.0658%)	⬆️

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

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	45.4402% <ø> (+0.0057%)	⬆️

[zimulala]

LGTM
Please check the MySQL tests.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zimulala

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-02-10 03:07:07.012186391 +0000 UTC m=+239469.408408453: ☑️ agreed by zimulala.