Code review comment for ~chad.smith/cloud-init:bug/1840080-ubuntu-drivers-emit-latelink-v2

Just validated on Eoan that this package properly sets up linux/nvidia/latelink true via debconf-get-selections.

The ubuntu-drivers-common package fixes has not yet published to Eoan. So, end-to-end validation will not be possible until an updated ubuntu-drivers-common and linux-modules-nvidia* is published.

As it is, this behavior paves the way for the ubuntu-drivers-common/linux-modules-nvidia package features.

# cloud-init properly registers and sets linux/nvidia/latelink : true
ubuntu@ip-172-31-30-68:~$ sudo debconf-get-selections | egrep 'cloud-init|late'
cloud-init linux/nvidia/latelink boolean true
cloud-init cloud-init/datasources multiselect NoCloud, ConfigDrive, OpenNebula, DigitalOcean, Azure, AltCloud, OVF, MAAS, GCE, OpenStack, CloudSigma, SmartOS, Bigstep, Scaleway, AliYun, Ec2, CloudStack, Hetzner, IBMCloud, None

# ubuntu-drivers-common was installed, but no linux-modules-nvidia-* yet
dpkg -l | egrep 'cloud-init|nvidia|ubuntu-drivers'
ii cloud-init 19.2-21-gcdd84698-1~bddeb all Init scripts for cloud instances
ii cloud-initramfs-copymods 0.44ubuntu1 all copy initramfs modules into root filesystem for later use
ii cloud-initramfs-dyn-netconf 0.44ubuntu1 all write a network interface file in /run for BOOTIF
ii libnvidia-cfg1-430:amd64 430.40-0ubuntu2 amd64 NVIDIA binary OpenGL/GLX configuration library
ii libnvidia-compute-430:amd64 430.40-0ubuntu2 amd64 NVIDIA libcompute package
ii nvidia-compute-utils-430 430.40-0ubuntu2 amd64 NVIDIA compute utilities
ii nvidia-headless-no-dkms-430 430.40-0ubuntu2 amd64 NVIDIA headless metapackage - no DKMS
ii nvidia-kernel-source-430 430.40-0ubuntu2 amd64 NVIDIA kernel source package
ii ubuntu-drivers-common 1:0.7.5 amd64 Detect and install additional Ubuntu driver packages

### If we manually install linux-modules-nvidia-430-generic, latelink appears set true
ubuntu@ip-172-31-16-66:~$ sudo debconf-get-selections | grep late
cloud-init linux/nvidia/latelink boolean true
linux-modules-nvidia-430-5.2.0-13-generic linux/nvidia/latelink booleantrue

# from dpkg -l on eoan-proposed
ii linux-modules-nvidia-430-5.2.0-13-generic 5.2.0-13.14 amd64 Linux kernel nvidia modules for version 5.2.0-13