.gitlab-ci.d/cirrus: Remove the netbsd and openbsd jobs

.gitlab-ci.d/cirrus: Remove the netbsd and openbsd jobs

During the past months, the netbsd and openbsd jobs in the Cirrus-CI
were broken most of the time - the setup to run a BSD in KVM on Cirrus-CI
from gitlab via the cirrus-run script was very fragile, and since the
jobs were not run by default, it used to bitrot very fast.

Now Cirrus-CI also introduce a limit on the amount of free CI minutes
that you get there, so it is not appealing at all anymore to run
these BSDs in this setup - it's better to run the checks locally via
"make vm-build-openbsd" and "make vm-build-netbsd" instead. Thus let's
remove these CI jobs now.

Message-ID: <20240426113742.654748-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit cc6cb422e09592158586279fddeef107df05ecbb)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>