[Feature Request] Support for virtiofs

[ajamtli]

Proxmox have support for sharing host directories with VMs using Virtiofs: Proxmox QM Virtiofs

The API is available for making the directories available to the VM:
virtiofs[n] [dirid=]<mapping-id> [,cache=<enum>] [,direct-io=<1|0>] [,expose-acl=<1|0>] [,expose-xattr=<1|0>]

It would be great to have the possibility to add a Virtfs directory to the VM using Terraform.