feat: trace WebHooks (#2911)

Previously the context was not propagated to the http client. As a result the (instrumented) client did not find the existing span and the sapns for outgoing http request have been orphains.

With this simple Fix they are now children of the corresponding webhook spans.

Author: martinei

selfservice/hook/web_hook.go

@@ -262,7 +262,7 @@ func (e *WebHook) execute(ctx context.Context, data *templateContext) error {
 	go func() {
 		defer close(errChan)
 
-		resp, err := e.deps.HTTPClient(ctx).Do(req)
+		resp, err := e.deps.HTTPClient(ctx).Do(req.WithContext(ctx))
 		if err != nil {
 			errChan <- errors.WithStack(err)
 			return