session: fix user info in general log (#34853)

[ti-srebot]

cherry-pick #34853 to release-5.4
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/34902

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

git push [email protected]:ti-srebot/tidb.git pr/34902:release-5.4-85c595c34bd2

---

Signed-off-by: Jack Yu [email protected]

What problem does this PR solve?

Issue Number: close #34852

Problem Summary:
User identity stringer interface changed in #30294, it affects the user info in general log.

What is changed and how it works?

Fix it.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

1. start a cluster
2. set tidb_general_log = 1; select 1;
3. check tidb.log

• 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 to write a quality release note.

None

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[ti-chi-bot]

@ti-srebot: This cherry pick PR is for a release branch and has not yet been approved by release team.
Adding the do-not-merge/cherry-pick-not-approved label.

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[ti-srebot]

/run-all-tests

[ti-srebot]

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