allow resize of virtio windows boot disk

virtio-win-0.1-74  have fixed the resize bug of virtio boot disk

Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
bump version to 3.1-25
pass snapname to PVE::Storage::vdisk_clone

Signed-off-by: Stefan Priebe <s.priebe@profihost.ag>
API2: remove require full parameter for snapshot cloning

Signed-off-by: Stefan Priebe <s.priebe@profihost.ag>
snapshot_delete: reorder parent "connection" after prepare

Signed-off-by: Stefan Priebe <s.priebe@profihost.ag>
bump version to 3.1-26