config: Add Lock View's config to config example and test (#25470)

[ti-srebot]

cherry-pick #25470 to release-5.1
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# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/25545

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---

What problem does this PR solve?

Problem Summary: Lock View's config pessimistic-txn.deadlock-history-capacity is not present in config example and the tests. cc #25332

What is changed and how it works?

What's Changed: Added the config pessimistic-txn.deadlock-history-capacity to the config example file and TestConfig.

Related changes

• Need to cherry-pick to the release branch
  • release-5.1

Check List

Tests

• Unit test

Release note

• No release note

[ti-srebot]

/run-all-tests

[ti-srebot]

@MyonKeminta you're already a collaborator in bot's repo.

[cfzjywxk]

/lgtm

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[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• cfzjywxk
• longfangsong

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[cfzjywxk]

/merge

[ti-chi-bot]

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

Commit hash: f5ebaf2

[zhouqiang-cl]

/merge

[ti-chi-bot]

@ti-srebot: Your PR was out of date, I have automatically updated it for you.

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