lightning: performance optimization for post-import conflict detection (#52656)

[ti-chi-bot]

This is an automated cherry-pick of #52656

What problem does this PR solve?

Issue Number: close #52306

Problem Summary: Optimization for lightning conflict detection.

What changed and how does it work?

Performance optimization for post-import conflict detection.

Check List

Tests

• [x] Unit test
• [x] 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

[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-04-29 12:08:53.163313031 +0000 UTC m=+272686.920448604: :ballot_box_with_check: agreed by lyzx2001.
• 2024-04-29 12:13:43.136534315 +0000 UTC m=+272976.893669887: :ballot_box_with_check: agreed by Benjamin2037.

[lyzx2001]

/cc @easonn7

[ti-chi-bot[bot]]

@lyzx2001: GitHub didn't allow me to request PR reviews from the following users: easonn7.

Note that only pingcap members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to [this](https://github.com/pingcap/tidb/pull/52990#issuecomment-2082571979): >/cc @easonn7 Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 68.95425% with 95 lines in your changes are missing coverage. Please review.

:exclamation: No coverage uploaded for pull request base (release-8.1@f37e5f3). Click here to learn what that means.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## release-8.1 #52990 +/- ## ================================================ Coverage ? 71.1328% ================================================ Files ? 1463 Lines ? 420589 Branches ? 0 ================================================ Hits ? 299177 Misses ? 100944 Partials ? 20468 ``` | [Flag](https://app.codecov.io/gh/pingcap/tidb/pull/52990/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | Coverage Δ | | |---|---|---| | [unit](https://app.codecov.io/gh/pingcap/tidb/pull/52990/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `71.1328% <68.9542%> (?)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap#carryforward-flags-in-the-pull-request-comment) to find out more. | [Components](https://app.codecov.io/gh/pingcap/tidb/pull/52990/components?src=pr&el=components&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | Coverage Δ | | |---|---|---| | [dumpling](https://app.codecov.io/gh/pingcap/tidb/pull/52990/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `53.9957% <0.0000%> (?)` | | | [parser](https://app.codecov.io/gh/pingcap/tidb/pull/52990/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `∅ <0.0000%> (?)` | | | [br](https://app.codecov.io/gh/pingcap/tidb/pull/52990/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pingcap) | `40.9516% <0.0000%> (?)` | |

[easonn7]

/approve

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Benjamin2037, easonn7, lyzx2001

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files: - ~~[lightning/OWNERS](https://github.com/pingcap/tidb/blob/release-8.1/lightning/OWNERS)~~ [Benjamin2037,easonn7] - ~~[pkg/lightning/OWNERS](https://github.com/pingcap/tidb/blob/release-8.1/pkg/lightning/OWNERS)~~ [Benjamin2037] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment