## Description
Three primary changes:
1. move the list of load test users into a secret in the github test domain.
2. purge all data that was generated for users in the load test
3. fix all `m356` typos.
## Type of change
- [x] 🤖 Test
- [x] 💻 CI/Deployment
## Issue(s)
* #1266
## Test Plan
- [x] 💪 Manual
- [x] 💚 E2E
## Description
Swap from GraphAPI-based data cleanup (which doesn't allow
us to access hidden folders like Audit retention or delete-restoration)
to powershell script-based cleanup (which allows us to make
SOAP requests against legacy exchange apis).
## Type of change
- [x] 🐛 Bugfix
- [x] 🤖 Test
## Issue(s)
* #1266
## Test Plan
- [x] 💪 Manual
- [x] 💚 E2E