Feature/batav0.10 raw

[zhangkai8048]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #11
Special notes for your reviewer:
add velero manual
Does this PR introduce a user-facing change?:

storageclass config:
- replace carina.storage.io/backend-disk-type: hdd   ==> carina.storage.io/backend-disk-group-name: hdd
- replace carina.storage.io/cache-disk-type: ssd     ==> carina.storage.io/cache-disk-group-name: ssd
- replace carina.storage.io/disk-type: "hdd"         ==> carina.storage.io/disk-group-name: "hdd"
pod config:
- replace kubernetes.customized/blkio.throttle.read_bps_device: "10485760"  ==> carina.storage.io/blkio.throttle.read_bps_device: "10485760"
- replace kubernetes.customized/blkio.throttle.read_iops_device: "10000"    ==> carina.storage.io/blkio.throttle.read_iops_device: "10000"
- replace kubernetes.customized/blkio.throttle.write_bps_device: "10485760" ==> carina.storage.io/blkio.throttle.write_bps_device: "10485760"
- replace kubernetes.customized/blkio.throttle.write_iops_device: "100000"  ==> carina.storage.io/blkio.throttle.write_iops_device: "100000"
- replace carina.io/rebuild-node-notready: true                             ==>  carina.storage.io/allow-pod-migration-if-node-notready: true