Ignore not found error while deactivating snapshot

[darkowlzz]

While deleting a VM, if the associated device mapper device has been
already deleted and cannot be found, the delete should continue without
any error.

Based on:

sudo bin/ignite vm rm -f young-surf
FATA[0000] command ["dmsetup" "remove" "--verifyudev" "ignite-bb967b1753deda1e"] exited with "device-mapper: remove ioctl on ignite-bb967b1753deda1e  failed: No such device or address\nCommand failed.\n": exit status 1

[stealthybox]

Reproduced locally -- verified this fixes the issue I was seeing.
My system is a WSL2 container. It doesn't have udevd which may be why Sunny can't reproduce but I can.