Move EE::AuditEvent specs to correct location
What does this MR do and why?
- Our testing guidelines for EE features based on CE features suggest that this file was in the wrong place.
- No user-facing changes.
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Related to #345024 (closed)