[epic] Support watchNamespaces via parameterization for registry+v1 bundles

[ncdc]

• Add extensible values field to Extension spec #612
• Add ytt config to all Apps that injects the environment variable for watch namespaces into all deployments, statefulsets, replicasets, replicationcontrollers, daemonsets #613
• Set condition if watchNamespaces is set and package doesn't support that mode #614

[oceanc80]

Add ytt config

• This should use the same method as used in OLM v0 (annotation key: 'olm.targetNamespaces')
• Look into if watchNamespaces can be passed as parameters to ytt