* add kio filter interface
This interface is an extension of the Filter interface which can be used
for filters which are capable of tracking which fields they mutate.
* add TrackableSetter struct to filtersutil
This struct provides an abstraction to help Filters implement the
TrackableFilter interface
* implement TrackableFilter with annotations
This updates the annotations filter to implement the TrackableFilter
interface by reusing the TrackableSetter abstraction provided by
filtersutil.
This is done to provide a generic and consistent experience across the
filters
* implement TrackableFilter with labels
This updates the labels filter to implement the TrackableFilter
interface by reusing the TrackableSetter abstraction provided by
filtersutil.
This is done to provide a generic and consistent experience across the
filters
