With the migration from linux-kvm to linux-virtual/generic for the mantic minimal
images we can now start building arm64 minimal cloud images.
When building initial test images we noticed that the flash-kernel package was being
installed. This is not required for EFI images.
This commit removes the flash-kernel package from the cloud images arm installs
The only images built using the livecd-rootfs ubuntu-cpc project for arm64 and armhf
which are not cloud images (which therefore do not require flash-kernel) are the
raspi images. raspi does require flash-kernel. But the raspi images use the
`ubuntu-server-raspi` task to install the flash-kernel. As such this non raspi
flash-kernel package install can be completely removed.
It also means that initramfs-tools and dracut-install are installed as these are dependencies
of flash-kernel package.
minimized cloud image policy, introduced in version 23.10.16, is to not install recommends for any package
installs during build. This is to keep the image as small as possible. This also extends to
the grub related packages.
This solves the problems detailed in LP: #2037075 and aligns other arches more with amd64 install of
grub/shim packages for both minimized and non minimized ubuntu-cpc cloud image builds.
With the introduction of the 6.5 kernel for mantic on 13th September ago we are seeing image build failures
on the armhf builds. The build failure was `No kernel output for generic-lpae!`.
Introduced in the 6.4 kernel and therefore now also in 6.5 there is no generic-lpae flavor anymore. it's just generic now.
As such this commit updates the expected flavour for armhf to generic.
minimize-manual takes an argument of the path to the chroot but of the 3 commands that are run the argument
is only used twice and with the third hardcoding "chroot" as the path to the chroot.
Thankfully "chroot" has been the patch passed in for the current uses of minimize-manual but this
could cause issues later if that were to change.
This commit resolves the problem preventing future issues.
