[test] Support Multi-Validator Regression Tests
Resolves #1749 (closed). This enables testing of multi-validator logic in regression tests for changes like !3177 (merged).
As of 2024-05-14 a change has been implemented to enforce access token expiry. If you see higher numbers of HTTP 401 responses, please check tokens that may have expired. For more details, including how to mitigate disruption, please check our docs guide on Expired Access Tokens. If you have a support contract, you may open a support ticket for additional assistance.
Resolves #1749 (closed). This enables testing of multi-validator logic in regression tests for changes like !3177 (merged).