We run tests in parallel mode (`go test -p 4`), default is to run in
parallel in fact. But tests are not isolated, as some of them launch
containerd on a fixed file socket (as socket path is hardcoded in
Talos), and that might lead to any weirdness when tests try to
launch containerd concurrently on the same file socket.
Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>
