add support to kernel-rt and kernel-rt-64k on aarch64

related to cki-project/kernel-workflow#808 (closed)

also add kernel-64k on aarch64 for rhel-9 since 9.2.

requested review from @stowellm and @ykopkova

FYI @afazekas @cyin2

approved this merge request

merged

mentioned in commit 29091b17