expression: push down mod() to TiFlash (#26494)

[ti-srebot]

cherry-pick #26494 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/27865

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

git push git@github.com:ti-srebot/tidb.git pr/27865:release-5.1-e116573fbb94

---

What problem does this PR solve?

Issue Number: close pingcap/tiflash#2318

Problem Summary:

What is changed and how it work

What's Changed: push down mod() to TiFlash.

How it Works:

Release note

• push down mod() to TiFlash.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• qw4990
• rebelice

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[ti-chi-bot]

@ti-srebot: Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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[ti-srebot]

/run-all-tests

[ti-srebot]

@riteme please accept the invitation then you can push to the cherry-pick pull requests. Comment with /cherry-pick-invite if the invitation is expired.
https://github.com/ti-srebot/tidb/invitations

[qw4990]

PTAL @rebelice

[Reminiscent]

/merge

[ti-chi-bot]

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

Commit hash: d26a904

[ti-chi-bot]

@ti-srebot: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

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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