linter: check AutoSyncInterval for etcd config

[lance6716]

What problem does this PR solve?

Issue Number: close #42643

Problem Summary:

What is changed and how it works?

Check List

Tests

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

compilepkg: nogo: errors found by nogo during build-time code analysis:
util/etcd/etcd.go:81:27: missing field AutoSyncInterval (etcdconfig)

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]

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• hawkingrei
• tiancaiamao

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[lance6716]

/merge

[ti-chi-bot]

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

Commit hash: 63dbe7a

[hawkingrei]

/retest

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #44090.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-4.0: #44091.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #44093.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-5.0: #44094.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-5.3: #44095.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-5.4: #44096.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.1: #44097.

[wuhuizuo]

/review default

[ti-chi-bot]

@wuhuizuo:

PR Title: linter: check AutoSyncInterval for etcd config

Key Changes:

1. A new linter is added, which checks for the presence of AutoSyncInterval field in the etcd configuration.
2. The AutoSyncInterval field is added to the etcd client configurations in dumpling/export/util.go and util/etcd/etcd.go.

Potential Problems:

1. The linter only checks for the presence of the AutoSyncInterval field but does not validate the value of the field.

Suggested Fixes:

If the value of AutoSyncInterval needs to be checked, the linter logic should be updated to validate the value in the run function.

Updated PR Description:

<!--

Thank you for contributing to TiDB!

PR Title Format:
1. pkg [, pkg2, pkg3]: what's changed
2. *: what's changed

-->

### What problem does this PR solve?

Issue Number: close #42643

Problem Summary: Adds a linter to check for the presence of the `AutoSyncInterval` field in the etcd configuration and updates etcd client configurations in `dumpling/export/util.go` and `util/etcd/etcd.go` accordingly.

### What is changed and how it works?

1. A new linter is added, which checks for the presence of `AutoSyncInterval` field in the etcd configuration.
2. The `AutoSyncInterval` field is added to the etcd client configurations in `dumpling/export/util.go` and `util/etcd/etcd.go`.

### Check List

Tests

- [ ] Unit test
- [x] 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](https://pingcap.github.io/tidb-dev-guide/contribute-to-tidb/release-notes-style-guide.html) to write a quality release note.

```release-note
Adds a linter to check for the presence of the AutoSyncInterval field in the etcd configuration and updates etcd client configurations accordingly.

<details>

In response to [this](https://github.com/pingcap/tidb/pull/44081#issuecomment-1558773997):

>/review default


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.
</details>