Epic: Remove all the dependencies for the old network stack

[Nino-K]

This is to track the progress of removing all components and dependencies related to the old networking stack.

• Remove Vtunnel #7362
• Remove privileged service from the code and the main repo #7384
• Remove dnsmasq from the code base #7413
• Combine both WSL_INIT_SCRIPT and WSL_INIT_RD_NETWORKING_SCRIPT #7395
• Remove listenerOnlyMode out of guestAgent #7447
• Remove Host Resolver #7393
• Remove networkingTunnel setting #7426

[jandubois]

All stories are done!