Make nydusd work with Google Artifact Registry

GAR throws 400 if you pass form data to the token request. It also needs the ability to make up to 2 redirects.

Author: andreasjansson

storage/src/backend/connection.rs

@@ -635,7 +635,7 @@ impl Connection {
         let mut cb = Client::builder()
             .timeout(timeout)
             .connect_timeout(connect_timeout)
-            .redirect(Policy::none())
+            .redirect(Policy::limited(2))
             .use_rustls_tls()
             .tcp_keepalive(Some(Duration::from_secs(5 * 60)))
             .pool_max_idle_per_host(pool_max_idle_per_host);

storage/src/backend/registry.rs

@@ -264,7 +264,7 @@ impl RegistryState {
                 Method::GET,
                 auth.realm.as_str(),
                 Some(&query),
-                Some(ReqBody::Form(form)),
+                None,
                 &mut headers,
                 true,
                 true,