blob: add shallow copy over a given device

A shallow copy will copy over the destination device only the
cluster allocated to the blob discarding those belonging
to the blob's parent snapshot, if an

blob: add shallow copy over a given device

A shallow copy will copy over the destination device only the
cluster allocated to the blob discarding those belonging
to the blob's parent snapshot, if any.

Change-Id: I763ba9d952b74bce2d5827abe1fc3f41b8ebd209
Signed-off-by: Damiano Cipriani <damiano.cipriani@suse.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/19247
Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Jim Harris <jim.harris@samsung.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>

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