This change adds a generic version of the various workqueue types while
retaining compatibility for the existing exported symbols and constructors.
The generic variants are prefixed with `Typed` and the existing ones are
marked as deprecated to nudge people to transition without breaking
them.
Kubernetes-commit: 0c7370bb851c15825d30a516722139ccccca0cfc
To be able to write more precise unit tests in the future
Change-Id: I8f45947dfacca501acd856849bd978fad0f735cd
Kubernetes-commit: dad8454ebb87ba7af897537db6d34033127bbfef
Two simple choices for workqueues do not document that they do not emit
metrics. Using their named variants fixes this, but was undocumented.
Change-Id: I100ad08a4859513987941ed35d12abb4cbb39873
Kubernetes-commit: f468bee672b0ccf9b97a85f17ec1f5645aced926