Adding support for Functions in crank validate (fixes #5491)

Signed-off-by: Jiri Tyr <jiri.tyr@gmail.com>

cmd/crank/beta/validate/manager.go

@@ -191,13 +191,17 @@ func (m *Manager) addDependencies() error {
 		deps := cfg.Spec.MetaSpec.DependsOn
 		for _, dep := range deps {
 			image := ""
-			if dep.Configuration != nil {
+			if dep.Configuration != nil { //nolint:gocritic // switch is not suitable here
 				image = *dep.Configuration
 			} else if dep.Provider != nil {
 				image = *dep.Provider
+			} else if dep.Function != nil {
+				image = *dep.Function
+			}
+			if len(image) > 0 {
+				image = fmt.Sprintf(imageFmt, image, dep.Version)
+				m.deps[image] = true
 			}
-			image = fmt.Sprintf(imageFmt, image, dep.Version)
-			m.deps[image] = true
 		}
 	}