Make error expection more general

What does this MR do?

Minor extraction from !40088 (merged) - makes an error expectation more general in anticipation of the error message changing.

Does this MR meet the acceptance criteria?

As a developer facing change, no changelog is needed.

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.