Mark VMware driver as unsupported

[spowelljr]

Related #16221

• Remove VMware from driver auto select
• Output exit message if user tries to use VMware driver
• Small cleanup of using magic strings for drivers

Before:

$ minikube start --driver vmware
😄  minikube v1.30.0 on Darwin 13.2.1
✨  Using the vmware driver based on user configuration
👍  Starting control plane node minikube in cluster minikube
💾  Downloading Kubernetes v1.26.3 preload ...
    > preloaded-images-k8s-v18-v1...:  397.02 MiB / 397.02 MiB  100.00% 53.18 M
🔥  Creating vmware VM (CPUs=2, Memory=6000MB, Disk=20000MB) ...

# hangs...

After:

$ minikube start --driver vmware
😄  minikube v1.30.0 on Darwin 13.2.1
✨  Using the vmware driver based on user configuration

❌  Exiting due to DRV_UNSUPPORTED: Due to security improvements to minikube, the VMware driver is currently not supported. Available workarounds are to use a different driver or downgrade minikube to v1.29.0.

    We are accepting community contributions to fix this, for more details on the issue see: https://github.com/kubernetes/minikube/issues/16221

[k8s-ci-robot]

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This pull-request has been approved by: medyagh, spowelljr

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