create zap-disk command for disk cleanup without going to the node

[ideepika]

we can add some checks for if the disk doesn't have preexisting ceph mappers, dont zap it, or can extend the purge-osd command to zap as well in the same operation.

this can be done with the help of debug-node

DISK=${1:-"/dev/sdX"}
NODE=${2:?"Node required if targeting remote"}

# Debug node via kubectl-debug (your prior pattern) [cite:30]
kubectl debug node/$NODE -it --image=ubuntu --share=true -- bash -c "
  apt update && apt install -y sgdisk parted util-linux blkdiscard;
  sgdisk --zap-all $DISK;
  dd if=/dev/zero of='$DISK' bs=1M count=100 oflag=direct,dsync;
  blkdiscard \$DISK 2>/dev/null || true;
  partprobe $DISK;
  echo 'Disk $DISK zapped successfully';