Default vgpu job

Job description

VGPU can be requested by both set "volcano.sh/vgpu-number" , "volcano.sh/vgpu-cores" and "volcano.sh/vgpu-memory" in resource.limit

apiVersion: v1
kind: Pod
metadata:
  name: test1
spec:
  restartPolicy: OnFailure
  schedulerName: volcano
  containers:
  - image: ubuntu:20.04
    name: pod1-ctr
    command: ["sleep"]
    args: ["100000"]
    resources:
      limits:
        volcano.sh/vgpu-memory: 1024
        volcano.sh/vgpu-number: 1