executor: reject setting read ts to a future time (#25732)

[ti-srebot]

cherry-pick #25732 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/25762

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

git push [email protected]:ti-srebot/tidb.git pr/25762:release-5.0-92ddceb6a4ab

---

What problem does this PR solve?

Issue Number: close #25680

What is changed and how it works?

This PR checks the read ts in two cases:

• Set by tidb_snapshot system variable
• Stale read

It first checks with latest local timestamp (with low cost). If the check fails, it gets a timestamp from PD to do a double check.

Related changes

• Need to cherry-pick to the release branch

Check List

Tests

• Unit test

Side effects

• Performance regression
  • Consumes more CPU
• Breaking backward compatibility

Release note

• Do not allow setting read timestamp to a future time.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has not been approved.

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

The full list of commands accepted by this bot can be found here.

Reviewer can indicate their review by submitting an approval review.
Reviewer can cancel approval by submitting a request changes review.

[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.

To merge this cherry pick, it must first be approved by the collaborators.

AFTER it has been approved by collaborators, please ping the release team in a comment to request a cherry pick review.

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]

/run-all-tests

[ti-srebot]

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

[sticnarf]

superseded by #25761