linstor: use sparse/discard qemu-img convert on thin devices#11787

DaanHoogland merged 1 commit intoapache:4.19apache/cloudstack:4.19from

LINBIT:linstor-4.19-use-sparse-convert-on-snapshot-revertLINBIT/cloudstack:linstor-4.19-use-sparse-convert-on-snapshot-revertCopy head branch name to clipboard