kprobe_test: remove pre-5.0 skips for kprobes
kprobe_test: remove pre-5.0 skips for kprobes

With version detection/rewriting now in place, these tests can be enabled on
kernels before 5.0.

Signed-off-by: Timo Beckers <98c2d5a1e48c998bd9ba9dbc53d6857beae1c9bd@isovalent.com>

cilium/ebpf,cilium/ebpf