Disable builtin.cgroup runtime test in CI
Disable builtin.cgroup runtime test in CI

It seems ubuntu diverges a bit from upstream linux for bpf helpers.
Despite already being at 5.0, the 5.0.0-1026-gcp kernel is missing
the cgroup helper. The cgroup helper should have been available in
v4.17-rc6-2000-gbf6fa2c893c5 as commit bf6fa2c893c5237b4
("bpf: implement bpf_get_current_cgroup_id() helper").

Rather than bump the kernel version requirement on the test again,
let's just disable this test indefinitely because I don't really know
how to predict when ubuntu will have this helper.

iovisor/bpftrace,iovisor/bpftrace,iovisor/bpftrace,iovisor/bpftrace