linux-its missing /boot/config.gz. Causes grub-mkconfig to fail for Xen based system

Package Information

Package name: linux-lts
Package version: linux-lts-6.12.1-r3
Alpine version: 3.21.0
Alpine architecture: x86_64

Summary

Running grub-mkconfig does not produce an entry with Xen.

Steps to reproduce

Around line 189 in /etc/grub.d/20_linux_xen requires the end of the config file in /boot to line up with the version name of the linux kernel (vmlinuz-lts). In previous releases the config file was named /boot/config-lts. Since Alpine 3.20 the name has been changed and causes this script to not generate a Xen based boot entry.

I was able to bypass this issue with a symlink of config-6.12.1-3-lts back to config-its.

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