Improve e2e Workbench Positron test isolation #3338
Description
The initial e2e Workbench Positron automation was merged via: #2984
The tests current reuse the same default rstudio user, and this requires some amount of manual cleanup and full container restart which has the following concerns:
- The manual cleanup is tightly tied to Workbench implementation which is planned to change at some point in the future
- The container restart is very slow
The Workbench team suggested using ssh to create new users for each test, and simply cleanup the users. This should provide easier test isolation and not require restarting the container.