changefeedccl: fix reversed args for containment check in test logic

[nicktrav]

Fix a testing bug introduced in #131545 where the Contains check arguments were reversed. The error string being searched should precede the string being searched for. The examples from the API docs:

//	require.Contains(t, "Hello World", "World")
//	require.Contains(t, ["Hello", "World"], "World")
//	require.Contains(t, {"Hello": "World"}, "Hello")

Release note: None

Epic: None

[cockroach-teamcity]

This change is 

[stevendanna]

😩

[rharding6373]

Thanks!

[rharding6373]

Any idea why this test was not failing before, and why is it not failing now that the ordering is fixed?

[andyyang890]

Any idea why this test was not failing before, and why is it not failing now that the ordering is fixed?

I was wondering the same thing so I ran the test through the debugger and it's because the Error() string is actually identical for both errors

[nicktrav]

TFTRs!

bors r+

[craig]

Build succeeded:

• docker_image_amd64
• unit_tests
• linux_amd64_fips_build
• check_generated_code
• examples_orms
• acceptance
• local_roachtest
• local_roachtest_fips
• lint
• linux_amd64_build

[blathers-crl]

Encountered an error creating backports. Some common things that can go wrong:

1. The backport branch might have already existed.
2. There was a merge conflict.
3. The backport branch contained merge commits.

You might need to create your backport manually using the backport tool.

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💡 Consider backporting to the fork repo instead of the main repo. See instructions for more details.

💡 Consider backporting to the fork repo instead of the main repo. See instructions for more details.

💡 Consider backporting to the fork repo instead of the main repo. See instructions for more details.

💡 Consider backporting to the fork repo instead of the main repo. See instructions for more details.

error creating backport branch refs/heads/blathers/backport-release-25.3-152880: POST https://api.github.com/repos/cockroachdb/cockroach/git/refs: 422 Reference already exists []

Backport to branch release-25.3 failed. See errors above.

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