ddl, executor: fix test race in terror (#25405)

[ti-srebot]

cherry-pick #25405 to release-5.1
You can switch your code base to this Pull Request by using git-extras:

# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/25409

After apply modifications, you can push your change to this PR via:

git push [email protected]:ti-srebot/tidb.git pr/25409:release-5.1-9321489621f6

---

What problem does this PR solve?

Issue Number: close #25393

Problem Summary:

NewStdErr is NOT thread-safe and need be used in init phase

What is changed and how it works?

Proposal: xxx

What's Changed, How it Works:

tiny fix...move to init phase

Related changes

• Need to cherry-pick to the release branch

Check List

Tests

• No code

Side effects

• n/a

Release note

• No release note

[ti-srebot]

/run-all-tests

[ti-srebot]

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

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• tiancaiamao
• xhebox

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[lysu]

/merge

[ti-chi-bot]

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

Commit hash: 836c491