tests: remove update 08 groups services test
tests: remove update 08 groups services test

This is a test around upgrading from Nomad 0.8, which is long since
no longer supported. The test is slow, flaky, and imports consul/sdk.

Remove this test as it is no longer relevant.

hashicorp/nomad,hashicorp/nomad,hashicorp/nomad,hashicorp/nomad,hashicorp/nomad,hashicorp/nomad