Meta trait revamp

[clux]

Some improvements that we should do to the Meta trait:

• Meta should not inherit from k8s_openapi::Metadata (originally Allow type-asserting Resources into Api<K>s #239, finally in Decouple Meta from k8s-openapi #385)
• Meta::meta should be deprecated (K8s openapi 0.9 #273) no longer necessary/possible
• Meta getters should not clone (Resource unnecessarily clones #233) - draft in Meta no longer clones - fixes #233 #311

The first one is necessary for people wanting to use Controller etc with a Resource::dynamic because otherwise we sneak in dependencies on k8s_openapi for it (and we should be able to get by without).

The inheritance removal is probably the hardest one to do. It sneaks in via ObjectRef::from_owner_ref atm and that is used everywhere in kube-runtime. Just noting it it down for now. Thought it was going to be quick, but it wasn't.

[clux]

Closing as the only thing left now is #233