Fully remove USB children when the parent USB device is removed #1055

Job	Run time
OS (apt-docker.io/amd64/ubuntu:devel)	1m 55s
OS (apt-docker.io/amd64/ubuntu:latest)	1m 48s
OS (apt-docker.io/amd64/ubuntu:rolling)	1m 45s
OS (apt-docker.io/i386/debian:testing)	1m 44s
OS (apt-docker.io/amd64/debian:testing)	1m 57s
OS (dnf-registry.fedoraproject.org/fedora:latest)	1m 59s
OS (dnf-registry.fedoraproject.org/fedora:rawhide)	1m 54s
OS (alpine-docker.io/alpine)	32s
OS (alpine-docker.io/i386/alpine)	34s
OS (alpine@gudev-docker.io/alpine)	29s
OS (nix-docker.io/nixos/nix)	1m 9s
OS (gentoo-)	5m 51s
OS (alpine@gudev-alpine, EXTRA_PACKAGES=libgudev-dev)	37s
	22m 14s

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