/usr/lib/python3/dist-packages/provisioningserver/boot/ is in python3-maas-provisioningserver 2.0.0~beta3+bzr4941-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/provisioningserver/boot/__init__.py
/usr/lib/python3/dist-packages/provisioningserver/boot/install_bootloader.py
/usr/lib/python3/dist-packages/provisioningserver/boot/install_grub.py
/usr/lib/python3/dist-packages/provisioningserver/boot/powerkvm.py
/usr/lib/python3/dist-packages/provisioningserver/boot/powernv.py
/usr/lib/python3/dist-packages/provisioningserver/boot/pxe.py
/usr/lib/python3/dist-packages/provisioningserver/boot/testing.py
/usr/lib/python3/dist-packages/provisioningserver/boot/tftppath.py
/usr/lib/python3/dist-packages/provisioningserver/boot/uefi.py
/usr/lib/python3/dist-packages/provisioningserver/boot/uefi_arm64.py
/usr/lib/python3/dist-packages/provisioningserver/boot/utils.py
/usr/lib/python3/dist-packages/provisioningserver/boot/windows.py