# What this PR does
Lays ground work for #1586. Adds three new fixtures, `adminRolePage`,
`editorRolePage`, and `viewerRolePage`. These fixtures can be easily
accessed in a `test` context and allow the test to be run as a user
authenticated with one of these Grafana basic roles.
The bulk of the changes in the PR are to the "global setup" step. There
is a bit of logic + communication with the Grafana instance's API, in
order to create all the necessary authentication credentials.
Lastly, adds the first basic role authorization test, asserting that
Admin/Editors can view the list of OnCall users, whereas Viewers cannot.
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [ ] Documentation added (or `pr:no public docs` PR label added if not
required)
- [ ] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)