rbd: Avoid flattening child images which are in trash

[Rakshith-R]

Describe the bug

Currently, ListChildren() goceph function lists all child images regardless of their existence in trash.

ceph-csi/internal/rbd/rbd_util.go

Line 2039 in 43b150f

_, children, err := image.ListChildren()

https://github.com/ceph/go-ceph/blob/e84ad6c5a35c0514773539c3462af300c3b50584/rbd/snapshot_nautilus.go#L138

We need to make use of new go-ceph API ListChildrenWithParams API in order to distinguish child images in trash and avoid trying to flatten them.
ceph/go-ceph#1079