feat(webconnectivity): long-term-evolution prototype (#882)

See https://github.com/ooni/probe/issues/2237

internal/registry/factory.go

@@ -215,7 +215,8 @@ func CanonicalizeExperimentName(name string) string {
 
 // NewFactory creates a new Factory instance.
 func NewFactory(name string) (*Factory, error) {
-	factory := allexperiments[CanonicalizeExperimentName(name)]
+	name = CanonicalizeExperimentName(name)
+	factory := allexperiments[name]
 	if factory == nil {
 		return nil, fmt.Errorf("no such experiment: %s", name)
 	}