test: add experiment list test for stop row action

[ashtonG]

Ticket

ET-661

Description

This adds an experiment list test for the stop action. it also introduces a new test fixture to allow for creating new experiments to be cleaned up afterwards on the fly.

Test Plan

Tests should pass

Checklist

• [x] Changes have been manually QA'd
• [x] New features have been approved by the corresponding PM
• [x] User-facing API changes have the "User-facing API Change" label
• [x] Release notes have been added as a separate file under docs/release-notes/ See Release Note for details.
• [x] Licenses have been included for new code which was copied and/or modified from any external code