/usr/share/bash-completion/completions/ is in libguestfs-tools 1:1.32.2-4ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/bash-completion/completions/guestfish
/usr/share/bash-completion/completions/guestmount
/usr/share/bash-completion/completions/virt-alignment-scan
/usr/share/bash-completion/completions/virt-builder
/usr/share/bash-completion/completions/virt-cat
/usr/share/bash-completion/completions/virt-df
/usr/share/bash-completion/completions/virt-edit
/usr/share/bash-completion/completions/virt-filesystems
/usr/share/bash-completion/completions/virt-format
/usr/share/bash-completion/completions/virt-inspector
/usr/share/bash-completion/completions/virt-log
/usr/share/bash-completion/completions/virt-ls
/usr/share/bash-completion/completions/virt-rescue
/usr/share/bash-completion/completions/virt-resize
/usr/share/bash-completion/completions/virt-sparsify
/usr/share/bash-completion/completions/virt-sysprep
/usr/share/bash-completion/completions/virt-v2v