Background: RHEL cloud images currently have 500 MiB of /boot, which is not enough for kernel updates.

Goal:

• Adjust partitioning of RHEL cloud images so kernel updates don't get broken.

Acceptance Criteria:

• Kernel updates (the 4th one) work fine with the new partitioning.

The current proposal of how to change the partitioning:

8.10

AWS x86_64: no separate /boot
AWS arm64: 1024 MiB /boot
other clouds: no separate /boot

(This is basically reverting the 8.9 change and also extending the one separate /boot that we had before)

9.4

everywhere: 1024 MiB /boot

(extending /boot to the recommended size)