Update kernel-source to version 6.3.6 / rev 692 via SR 1090845
https://build.opensuse.org/request/show/1090845
by user jirislaby + dimstar_suse
6.3.6 & 6.3.5 & XFS CVE fix & one AMD GPU fix (one bug still remaining) & set X86_KERNEL_IBT=y (as per other distros and upstream default)