initramfs-tools: support missing /etc/udev/udev.conf
Installing initramfs-tools fails in case /etc/udev/udev.conf
is
removed:
update-initramfs: Generating /boot/initrd.img-6.8.0-45-generic
cp: could not get status from '/etc/udev/udev.conf': Non-existent file or directory
E: /usr/share/initramfs-tools/hooks/udev failed with return 1.
update-initramfs: failed for /boot/initrd.img-6.8.0-45-generic with 1.
Support this use case.
Bug-Ubuntu: https://launchpad.net/bugs/2084592