iso: Enable VirtioFS for x86_64 and aarch64

The Virtio Filesystem[1] allows guests to mount file systems from the
host.

Testing with krunkit show 10 times faster read throughput:

minikube krunkit - 9p:

    $ time cp /mnt/models/mistral-7b-instruct-v0.2.Q4_K_M.gguf model

    real	0m34.330s
    user	0m0.019s
    sys     0m1.959s

podman krunkit - virtiofs:

    $ time cp /Users/nir/Downloads/models/mistral-7b-instruct-v0.2.Q4_K_M.gguf model

    real	0m3.245s
    user	0m0.006s
    sys     0m1.035s

We must have virtiofs for playing with AI workload in krunkit. It can be
nice improvment for vfkti and qemu, and should be available in ohter
hypervisors.

[1] https://virtio-fs.gitlab.io/index.html

Author: nirs

deploy/iso/minikube-iso/board/minikube/aarch64/linux_aarch64_defconfig

@@ -892,6 +892,7 @@ CONFIG_QFMT_V2=y
 CONFIG_AUTOFS_FS=y
 CONFIG_FUSE_FS=m
 CONFIG_CUSE=m
+CONFIG_VIRTIO_FS=m
 CONFIG_OVERLAY_FS=m
 CONFIG_VFAT_FS=y
 CONFIG_PROC_CHILDREN=y

deploy/iso/minikube-iso/board/minikube/x86_64/linux_x86_64_defconfig

@@ -463,6 +463,7 @@ CONFIG_QUOTA_NETLINK_INTERFACE=y
 CONFIG_QFMT_V2=y
 CONFIG_AUTOFS_FS=y
 CONFIG_FUSE_FS=y
+CONFIG_VIRTIO_FS=m
 CONFIG_OVERLAY_FS=m
 CONFIG_ISO9660_FS=y
 CONFIG_JOLIET=y