runtime/kubernetes: rewrite to improve support of multiple versions of a single service (#2035)

* wip: refactor kubernetes package

* runtime/kubernetes: fix invalid labels

* runtime/kubernetes: handle delete service not found error

* Misc Fixes

* runtime: add ServiceAccount option

* router/static: return noop table

* add kubernetes router

* runtime: add port option

* store/file: set directory

* store/file: pass options to blob store

* Revert changes to static router

* Fix merge error

* runtime/kubernetes: Debug => Error logs

* runtime/kubernetes: fix double if

util/kubernetes/client/templates.go

@@ -84,7 +84,7 @@ spec:
           - {{.}}
           {{- end }}
           image: {{ .Image }}
-          imagePullPolicy: Always
+          imagePullPolicy: IfNotPresent
           ports:
           {{- with .Ports }}
           {{- range . }}