As the maintainer of WPGraphQL, I would like to run tests in a multisite environment, to ensure functionality works as expected on multisite setups.

Currently all tests are running in single site WordPress installs.

We had a regression to a multisite feature #2274 and we should be able to prevent this by having test suite(s) run in multisite.

I would like to test #2274 as the first test in the suite(s) that run in multisite.