Add a test for m5 instances on AWS
Add a test for m5 instances on AWS

M5 intances have nvme and also need the ENA driver.

NVME support: https://github.com/kubernetes/kubernetes/pull/56607

GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid