Auto select network on QEMU

[spowelljr]

• Added validation to prevent passing socket_vmnet flag when not on macOS
• Added validation to prevent passing invalid flags
• Added network auto selection
  • If not on macOS, always use user
  • Check for socket_vmnet, if present on system use it
  • Else, use user
• If user passed --network socket_vmnet
  • Check if present on system, if not error and give instructions
• Removed message Using qemu with 'socket_vmnet' network is experimental

Starting on Linux with socket_vmnet:

$ minikube start --driver qemu --network socket_vmnet
😄  minikube v1.27.1 on Debian 11.5
✨  Using the qemu2 (experimental) driver based on user configuration

❌  Exiting due to MK_USAGE: The socket_vmnet network is only supported on macOS

Starting on macOS with no flag and socket_vmnet not installed:

$ minikube start --driver qemu
😄  minikube v1.27.1 on Darwin 12.6.1 (arm64)
✨  Using the qemu2 (experimental) driver based on user configuration
🌐  Automatically selected the user network
❗  You are using the QEMU driver without a dedicated network, which doesn't support `minikube service` & `minikube tunnel` commands.
To try the experimental dedicated network see: https://minikube.sigs.k8s.io/docs/drivers/qemu/#networking
...

Starting on macOS with invalid flag:

$ minikube start --driver qemu --network invalid
😄  minikube v1.27.1 on Darwin 12.6.1 (arm64)
✨  Using the qemu2 (experimental) driver based on user configuration

❌  Exiting due to MK_USAGE: --network with QEMU must be 'user' or 'socket_vmnet'

Starting on macOS with socket_vmnet flag and socket_vmnet not installed:

$ minikube start --driver qemu --network socket_vmnet
😄  minikube v1.27.1 on Darwin 12.6.1 (arm64)
✨  Using the qemu2 (experimental) driver based on user configuration

🙈  Exiting due to NOT_FOUND_SOCKET_VMNET: 


💡  Suggestion: 

    socket_vmnet was not found on the system, resolve by:
    
    Option 1) Installing socket_vmnet:
    
    https://minikube.sigs.k8s.io/docs/drivers/qemu/#networking
    
    Option 2) Using the user network:
    
    minikube start --driver qemu --network user

Starting on macOS with no flag and socket_vmnet installed:

$ minikube start --driver qemu
😄  minikube v1.27.1 on Darwin 12.6.1 (arm64)
✨  Using the qemu2 (experimental) driver based on user configuration
🌐  Automatically selected the socket_vmnet network

[medyagh]

in the website lets mention, if doesnt work, they might wanna make uninstall and then restart and then install again

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[spowelljr]

in the website lets mention, if doesnt work, they might wanna make uninstall and then restart and then install again