expression: Support mathematical functions pushdown to tiflash (#25596)

[ti-srebot]

cherry-pick #25596 to release-5.0
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/26918

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

git push git@github.com:ti-srebot/tidb.git pr/26918:release-5.0-ebb7d70268be

---

What problem does this PR solve?

Related to pingcap/tiflash#1901
Issue Number: close #xxx

Problem Summary:

What is changed and how it works?

What's Changed:
pushdown all mathematics functions to tiflash(except sqrt, ceil, floor and round because they've been already supported by #25085)

How it Works:

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• Need to cherry-pick to the release branch

Check List

Tests

• Manual test (add detailed scripts or steps below)
  Use tiflash/integrated/ops or algernon to run a tidb-server and use explain query to make sure corresponding expression is pushed down

Side effects

Release note

• Pushdown all mathematical functions to tiflash

[ti-chi-bot]

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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-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-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.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[ti-srebot]

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