ddl: fix adding multi-value index (#51884)

[ti-chi-bot]

This is an automated cherry-pick of #51884

What problem does this PR solve?

Issue Number: close #51162

Problem Summary:

What changed and how does it work?

Restored data should not truncated in buildHandle.

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.

None

[Benjamin2037]

LGTM

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release-8.0@bca83e6). Click here to learn what that means.
The diff coverage is 45.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-8.0     #51970   +/-   ##
================================================
  Coverage               ?   70.6468%           
================================================
  Files                  ?       1477           
  Lines                  ?     438284           
  Branches               ?          0           
================================================
  Hits                   ?     309634           
  Misses                 ?     109182           
  Partials               ?      19468           

Flag	Coverage Δ
unit	70.4390% <45.0000%> (?)

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

Components	Coverage Δ
dumpling	53.9957% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	45.8594% <0.0000%> (?)

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Benjamin2037, ywqzzy

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• OWNERS [Benjamin2037,ywqzzy]
• pkg/ddl/OWNERS [Benjamin2037,ywqzzy]

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-03-21 05:14:39.293165797 +0000 UTC m=+1526506.315412178: ☑️ agreed by Benjamin2037.
• 2024-03-21 06:15:02.116565098 +0000 UTC m=+1530129.138811487: ☑️ agreed by ywqzzy.