ubuntu-22.04 runners do not have matching linux-modules-extra package, so some kernel modules are just not available

[RalfJung]

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Bug

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Describe the bug
I need the l2tp_netlink and l2tp_eth kernel modules to be loaded for my CI. On the ubuntu-20.04 runner, it is possible to install them as follows:

sudo apt install linux-modules-extra-$(uname -r)
sudo modprobe l2tp_netlink
sudo modprobe l2tp_eth

However, on ubuntu-22.04, this does not work any more.

To Reproduce
Steps to reproduce the behavior:

1. Run the above commands on a ubuntu-22.04 runner

The result is an error:

E: Package 'linux-modules-extra-5.15.0-1042-azure' has no installation candidate

Without installing the package, unsurprisingly the modprobe will fail.

It looks like a package linux-modules-extra-5.15.0-1041-azure exists, but that is of no use -- the package must match the running kernel. Seems like a mistake was made when preparing the Azure Ubuntu kernel packages.

Expected behavior
linux-modules-extra-$(uname -r) should exist as a package