runtime: set shared_fs=none to qemu-coco-dev configuration

Just like the TEE configurations (sev, snp, tdx) we want to have the
qemu-coco-dev using shared_fs=none.

Fixes: #9676
Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>

src/runtime/Makefile

@@ -244,7 +244,7 @@ DEFDISABLEBLOCK := false
 DEFSHAREDFS_CLH_VIRTIOFS := virtio-fs
 DEFSHAREDFS_QEMU_VIRTIOFS := virtio-fs
 # Please keep DEFSHAREDFS_QEMU_COCO_DEV_VIRTIOFS in sync with TDX/SEV/SNP
-DEFSHAREDFS_QEMU_COCO_DEV_VIRTIOFS := virtio-9p
+DEFSHAREDFS_QEMU_COCO_DEV_VIRTIOFS := none
 DEFSHAREDFS_STRATOVIRT_VIRTIOFS := virtio-fs
 DEFSHAREDFS_QEMU_TDX_VIRTIOFS := none
 DEFSHAREDFS_QEMU_SEV_VIRTIOFS := none

src/runtime/config/configuration-qemu-coco-dev.toml.in

@@ -176,10 +176,10 @@ default_maxmemory = @DEFMAXMEMSZ@
 disable_block_device_use = @DEFDISABLEBLOCK@
 
 # Shared file system type:
-#   - virtio-fs (default)
+#   - virtio-fs
 #   - virtio-9p
 #   - virtio-fs-nydus
-#   - none
+#   - none (default)
 shared_fs = "@DEFSHAREDFS_QEMU_COCO_DEV_VIRTIOFS@"
 
 # Path to vhost-user-fs daemon.