[cki-tests] [kpet-db] remove waived flag from kselftests/net
As we plan to deprecate the waived flag on kpet-db (&187 (closed)) we should either remove the waived flag or if the test still not stable we should disable it from running on cki.
Failures should be triaged in a DataWarehouse issue with a regex to match it (https://cki-project.org/docs/test-maintainers/triager/)
kselftests/net are split in 2 sets. One for rhel/centos run and another for upstream testing.