Reattempt Node installation if the installation itself errors

This also makes us a bit more aggressive about reinstalling Node

crates/zed/src/main.rs

@@ -136,7 +136,7 @@ fn main() {
         languages.set_executor(cx.background().clone());
         languages.set_language_server_download_dir(paths::LANGUAGES_DIR.clone());
         let languages = Arc::new(languages);
-        let node_runtime = NodeRuntime::instance(http.clone(), cx.background().to_owned());
+        let node_runtime = NodeRuntime::instance(http.clone());
 
         languages::init(languages.clone(), node_runtime.clone());
         let user_store = cx.add_model(|cx| UserStore::new(client.clone(), http.clone(), cx));

crates/zed/src/zed.rs

@@ -2364,7 +2364,7 @@ mod tests {
         languages.set_executor(cx.background().clone());
         let languages = Arc::new(languages);
         let http = FakeHttpClient::with_404_response();
-        let node_runtime = NodeRuntime::instance(http, cx.background().to_owned());
+        let node_runtime = NodeRuntime::instance(http);
         languages::init(languages.clone(), node_runtime);
         for name in languages.language_names() {
             languages.language_for_name(&name);