Using mantine breaks tests.

tests are failing now because mantine requires the render function to include the 'mantineprovider' in the path.

"@mantine/core: MantineProvider was not found in component tree, make sure you have it in your app"

Originally posted by @nomadme in #4900 (comment)

see also: https://community.redwoodjs.com/t/error-mantineprovider-was-not-found-in-component-tree/5390