insert: fix the auto id retry won't cast the datum to origin type (#29997)

[ti-srebot]

cherry-pick #29997 to release-4.0
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/30019

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

git push git@github.com:ti-srebot/tidb.git pr/30019:release-4.0-51f53f3376bd

---

Signed-off-by: ailinkid 314806019@qq.com

What problem does this PR solve?

Issue Number: close #29892

What is changed and how it works?

• Fix the session retry won't cast the datum to the origin type under insert into select from
• In the original issue Retrying transaction with a double type auto-increment column leads to data error #29892, the session1 commit should fail with duplicate entry while it doesn't. Because the session2's inserted key is built from (double)146576795, while the session1's retried key is built from (int64)146576795 without cast. Different type contributing the comparison failure.

Tests

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

same as what has been described in the issue

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• djshow832
• tangenta

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[ti-srebot]

/run-all-tests

[ti-srebot]

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

[zhouqiang-cl]

/merge

[ti-chi-bot]

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

Commit hash: 697ab26