Use resource watcher instead of Api::watch

[kate-goldenring]

Is your feature request related to a problem? Please describe.
Akri's Agent and Controller watch Pods, Nodes, Instances, and Configuration resources from the Kubernetes API Server. Currently, these watches are done using the kube-rs Api::watch function. Now that we have updated to the latest tokio versions in #361, we can take advantage of kube-rs's watcher function, which, compared to Api::watch, will automatically try to recover the stream upon errors."

Describe the solution you'd like
Change these to use watcher:
Instance watcher
Node watcher
Pod watcher
Configuration watcher

Additional context
This may help solve #222 if it can handle disconnects with API server