seccomp policy doesn't take new format into account

[raesene]

At the moment the seccomp policy uses the annotation based format to check whether a seccomp policy has been specified.

As of Kubernetes 1.19, seccomp graduated to GA and the seccomp setting migrated to securityContext (docs here).

Probably a good idea to check in both locations for the seccomp policy being specified, to avoid incorrectly flagging manifests as missing this setting.