resolved_ts: use smaller timeout when do check_leader (#16000) (#16943)

[ti-chi-bot]

This is an automated cherry-pick of #16943

This is a cherry-pick of #16000

What is changed and how it works?

Issue Number: Close #15999

What's Changed:

• use smaller timeout when do check_leader, to to reduce the impact of a single TiKV slowing down on the advance resolve_ts of other TiKVs

Related changes

• Need to cherry-pick to the release branch

Check List

Tests

• Manual test (add detailed scripts or steps below)

Before

This PR

Side effects

• N/A

Release note

None.

[ti-chi-bot]

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• cfzjywxk
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[cfzjywxk]

/merge

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[cfzjywxk]

/merge

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@cfzjywxk: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

You only need to trigger /merge once, and if the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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[ti-chi-bot]

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

Commit hash: a0d4e0a

[ti-chi-bot]

@ti-chi-bot: Your PR was out of date, I have automatically updated it for you.

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