kata_agent: Remove sharedDirVirtioFSOptions

Although in the earlier stages of development those FUSE client mount
options were needed, when virtiofs got merged the default option values
were baked into virtiofs.ko.

Those options are not only unneeded, but they'd also cause issues when
trying to run recent enough kernels, as shown below:
```
[root@f32 runtime]# podman run --security-opt label=disable  --runtime=/usr/local/bin/kata-runtime --rm -id fedora sh
Error: rpc error: code = Internal desc = Could not mount kataShared to /run/kata-containers/shared/containers/: invalid argument: OCI runtime error
```

Fixes: #2464

Signed-off-by: Fabiano Fidêncio <[email protected]>

virtcontainers/kata_agent.go

@@ -76,7 +76,7 @@ var (
 	kataNvdimmDevType           = "nvdimm"
 	kataVirtioFSDevType         = "virtio-fs"
 	sharedDir9pOptions          = []string{"trans=virtio,version=9p2000.L,cache=mmap", "nodev"}
-	sharedDirVirtioFSOptions    = []string{"default_permissions,allow_other,rootmode=040000,user_id=0,group_id=0", "nodev"}
+	sharedDirVirtioFSOptions    = []string{}
 	sharedDirVirtioFSDaxOptions = "dax"
 	shmDir                      = "shm"
 	kataEphemeralDevType        = "ephemeral"