vagrant: Start VM after existing VMs are deleted
vagrant: Start VM after existing VMs are deleted

In start.sh, we have some code to detect existing VMs and propose to the
user to delete or stop them. After executing those actions, we can
directly proceed with start.sh and the provisioning of new development
VMs. There's no need for the user to run the command a second time.

Signed-off-by: Paul Chaignon <a027184a55211cd23e3f3094f1fdc728df5e0500@cilium.io>

tklauser/cilium,tklauser/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,tklauser/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,tklauser/cilium,cilium/cilium,tklauser/cilium