api: rename ContainerWakeupProbe message to WakeupProbe in ateapi.proto #2409

Problem

In pkg/proto/ateapipb/ateapi.proto, Container defines several submessages:

• EnvVar (repeated EnvVar env = 3)
• VolumeMount (repeated VolumeMount volume_mounts = 4)
• Resources (Resources resources = 5)
• ContainerWakeupProbe (ContainerWakeupProbe wakeup_probe = 6)
• SecurityContext (SecurityContext security_context = 7)

ContainerWakeupProbe is the only submessage of Container that carries a Container prefix (whereas SecurityContext, Capabilities, EnvVar, VolumeMount, Resources, and HTTPGetAction do not, and Kubernetes corev1.Container similarly names its probe message
Probe).

Additionally, both internal protos (internal/proto/ateletpb/atelet.proto and internal/proto/ateompb/ateom.proto) already name this message WakeupProbe.

Proposal

1. Rename message ContainerWakeupProbe to message WakeupProbe in pkg/proto/ateapipb/ateapi.proto (WakeupProbe wakeup_probe = 6; on Container).
2. Regenerate protobufs and validation code (hack/protoc.sh, hack/update-codegen.sh).
3. Update all Go callers and docs/api-guide.md (ContainerWakeupProbe -> WakeupProbe).