Test cloud 5.1

[Little-Wallace]

What is changed and how it works?

Close #xxx

What's Changed:

Related changes

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

Check List

Tests

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

Side effects

• Performance regression
  • Consumes more CPU
  • Consumes more MEM
• Breaking backward compatibility

Release note

Please add a release note.
If you don't think this PR needs a release note then fill it with None.
If this PR will be picked to release branch, then a release note is probably required.