Restore tests that assert fixture ordering

[armanbilge]

This version of munit reverts the fixture ordering (see release notes for more details https://github.com/scalameta/munit/releases/tag/v1.0.0-M11)

munit-cats-effect changed it's fixture tests in https://github.com/typelevel/munit-cats-effect/pull/223 to not depend on the old ordering. I think we should bring add back the old test suite.

Originally posted by @valencik in https://github.com/typelevel/munit-cats-effect/issues/350#issuecomment-1924481404