Create new cos beta e2e tests (#2986)
Create new cos beta e2e tests (#2986)

* Create cos-k8s valication suites

* standardize test name + use hash as test project name

* extract from k8s and set gci version

* specify cos beta image + fix rebase

* update image for new cosbeta jobs

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