[PATCH] test/bpf: remove validation tests from CI

[Marat Khalili]

> > I think I know the issue, it's tmpfs exhaustion. After some recent changes each
> > test consumes 25MB in the --file-prefix directory independently, easily driving
> > small VMs out of space. My ~30 new tests were the last drop for the CI.
> 
> I don't whether it would improve, but it is a lot of tests,
> could you take this opportunity to group all BPF validation tests
> in a single registered test?
> At least it would reduce the noise in test reports.

TBH wasting many GBs of /run for no reason is a problem anyway.
I had problems with running DPDK tests in small containers after
--file-prefix became test-specific, but did not connect the dots.

I will try to merge new tests into one too if it helps test reports
(hopefully they won't exceed fast test timeout as a result).