Detect individual extension points from plugin types

- Populate extension points automatically from plugin types
- Make a list of enabled extension points based on a profile
  configuration
- Populate filter and pre-eviction filter handles from their
  corresponding extension points

pkg/framework/pluginregistry/pluginregistry.go

@@ -42,7 +42,7 @@ type (
 	PluginArgDefaulter = func(args runtime.Object)
 )
 
-type Registry = map[string]PluginUtilities
+type Registry map[string]PluginUtilities
 
 func NewRegistry() Registry {
 	return Registry{}