Quarantine promote_to_epic_spec that is hitting Threshold Exceeded Error

What does this MR do?

promote_to_epic_spec is throwing Gitlab::QueryLimiting::Transaction::ThresholdExceededError since !63395 (merged) when I test locally although master pipelines did not have the same result.

This MR quarantines the failing test temporarily as reverting !63395 (merged) this close to %14.0 release may have negative ramifications.

Does this MR meet the acceptance criteria?

Conformity

• [-] I have included changelog trailers, or none are needed. (Does this MR need a changelog?)
• [-] I have added/updated documentation, or it's not needed. (Is documentation required?)
• [-] I have properly separated EE content from FOSS, or this MR is FOSS only. (Where should EE code go?)
• [-] I have added information for database reviewers in the MR description, or it's not needed. (Does this MR have database related changes?)
• I have self-reviewed this MR per code review guidelines.
• This MR does not harm performance, or I have asked a reviewer to help assess the performance impact. (Merge request performance guidelines)
• I have followed the style guides.
• This change is backwards compatible across updates, or this does not apply.