Move the test wait terminate service to a test module

Problem/Motivation

See #3421164-25: Log every individual query in performance tests → . If we move that service to a test module, and tests that rely on the trait need to add it, then we'd not execute that query for every requests in every other test. This would make performance tests more realistic and be one less thing that happens during tests.

The downside is having to both enable the module AND use the trait, but there aren't that many tests which this affects.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet