session/variable: forbid changing @@global.require_secure_transport to 'on' with SEM enabled #47677

[tiancaiamao]

What problem does this PR solve?

Issue Number: close #47665

Problem Summary:

Cherry-pick #47677 to release-6.5

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

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

[tiprow]

Hi @tiancaiamao. Thanks for your PR.

PRs from untrusted users cannot be marked as trusted with /ok-to-test in this repo meaning untrusted PR authors can never trigger tests themselves. Collaborators can still trigger tests on the PR using /test all.

I understand the commands that are listed here.

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.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (release-6.5@643b328). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-6.5     #48735   +/-   ##
================================================
  Coverage               ?   73.6759%           
================================================
  Files                  ?       1085           
  Lines                  ?     349357           
  Branches               ?          0           
================================================
  Hits                   ?     257392           
  Misses                 ?      75524           
  Partials               ?      16441           

[bb7133]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bb7133, CbcWestwolf

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

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [CbcWestwolf,bb7133]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-11-21 03:25:24.34775628 +0000 UTC m=+288353.012982488: ☑️ agreed by CbcWestwolf.
• 2023-11-22 00:06:17.760113577 +0000 UTC m=+362806.425339772: ☑️ agreed by bb7133.