br: fix unstable s3 test (#33610)

[ti-srebot]

cherry-pick #33610 to release-6.0
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/33648

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

git push [email protected]:ti-srebot/tidb.git pr/33648:release-6.0-d3245357d08d

---

Signed-off-by: Yu Juncen [email protected]

What problem does this PR solve?

Issue Number: close #33644

Problem Summary:

The test case br_s3 is unstable. The reason would probably be that curl exit with 0 even it met a 503 HTTP CODE. At this condition, mc would fail soon and so did the test.

What is changed and how it works?

Test the status code instead of the exit code of curl.

Check List

Tests

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

Release note

None

[ti-chi-bot]

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[ti-srebot]

/run-all-tests

[ti-srebot]

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

[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/ae42996248d27f39cab0d83a81ab67f50c107d8d

[xhebox]

closed for DMR version