mockery has introduced breaking changes and switched to a v3 branch,
this migrates to that, mostly using the built-in migration tool. Mocks
are now generated in single files per package, except in packages
containing mocks for multiple interface packages (in
pkg/kubelet/container/testing).
Signed-off-by: Stephen Kitt <skitt@redhat.com>
Kubernetes-commit: 81cec6df1d0b6393ff25195aa3be65e79d341197
