ddl: correct ingest row count for partition tables

[tangenta]

What problem does this PR solve?

Issue Number: close #43586

Problem Summary:

Previously, the checkpoint manager is created or closed in each partition. It doesn't have a way to "remember" the row count in previous partition. As a result, the row count reported by the Status() function from checkpoint manager is always the last partition.

What is changed and how it works?

Create or close the checkpoint manager for each table instead of each partition.

Check List

Tests

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

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

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• Benjamin2037
• wjhuang2016

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[tangenta]

/retest

[Benjamin2037]

LGTM

[tangenta]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 98bead0

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #43606.