Rework linux and linux-lts meta packages, also update linux-lts

[ericonr]

Our dances for installing a given kernel version but still having firmware and dracut are error prone and unnecessary. This PR aims to solve that.

If we want to split the dracut dependency for greater initramfs flexibility, we can discuss that here too.

[ericonr]

@void-linux/pkg-committers

[ahesford]

I like this. We could make an initramfs virtual in place of dracut, but I don't really know wheter it's better to make the initramfs kernel hooks for every generator aware of /etc/default/initramfs-regenerate or to make a centralized kernel hook that is aware of every possible initramfs generator.

[ericonr]

I worry about the virtual option because of how XBPS chooses to install virtuals. For example, when booster is merged, it might be installed in dracut's place.

A common hook, otoh, sounds great to me. I much prefer it over duplicating logic across hooks for each generator.

[ahesford]

Yeah, I know a virtual is problematic, but we don't really have the machinery for alternate packages with a specific default.

Before, the issue with a central hook was where to put it. Putting the hook (post-install and post-remove) in your new linux-base makes perfect sense. We can keep the hard dracut dependency in linux-base for now, and people who want to use an alternative can install whatever they want, set /etc/default/initramfs-regenerate as appropriate, and ignorepkg if they really care about removing dracut.

[ericonr]

As mentioned on IRC, having the common hook in linux-base would be bad for users who don't have that package. A cleaner fix is including the hook directly in xbps-triggers.