Update tiniest VM creation config on minikube : fix for error RSRC_INSUFFICIENT_CORES

[pruthvitd]

Update test/envs/vm.yaml with 2 cpu count to resolve the following error:

$ drenv start envs/vm.yaml
2024-11-11 01:35:05,809 INFO    [vm] Starting environment
2024-11-11 01:35:05,943 INFO    [cluster] Starting minikube cluster
2024-11-11 01:35:06,330 ERROR   Command failed
:
  File "/home/ramenuser/ramen/test/drenv/commands.py", line 207, in watch
    raise Error(args, error, exitcode=p.returncode)
drenv.commands.Error: Command failed:
   command: ('minikube', 'start', '--profile', 'cluster', '--driver', 'kvm2', '--container-runtime', 'containerd', '--disk-size', '20g', '--nodes', '1', '--cni', 'auto', '--cpus', '1', '--memory', '2g', '--extra-config', 'kubelet.serialize-image-pulls=false', '--insecure-registry=host.minikube.internal:5000')
   exitcode: 29
   error:
      X Exiting due to RSRC_INSUFFICIENT_CORES: Requested cpu count 1 is less than the minimum allowed of 2