支持RAW缓存卷

[snwyc]

Is your feature request related to a problem?/Why is this needed

目前carina项目只支持数据卷LVM和缓存卷LVM的管理模式；
如果raw做为缓存卷，性能会比lvm缓存卷性能更好。

Describe the solution you'd like in detail

比如：创建SC
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: carina-lvm-cache-raw-xfs
provisioner: carina.storage.io
parameters:
csi.storage.k8s.io/fstype: xfs
carina.storage.io/backend-disk-group-name: carina-lvm
carina.storage.io/cache-disk-group-name: carina-cache-raw
carina.storage.io/cache-disk-ratio: "50"
carina.storage.io/cache-policy: writethrough
reclaimPolicy: Delete
allowVolumeExpansion: true
volumeBindingMode: WaitForFirstConsumer

Describe alternatives you've considered

Additional context