Allow using system node (#18172)

Release Notes:

- (Potentially breaking change) Zed will now use the node installed on
your $PATH (if it is more recent than v18) instead of downloading its
own. You can disable the new behavior with `{"node":
{"disable_path_lookup": true}}` in your settings. We do not yet use
system/project-local node_modules.

---------

Co-authored-by: Mikayla <mikayla@zed.dev>

crates/languages/src/json.rs

@@ -59,13 +59,13 @@ fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
 }
 
 pub struct JsonLspAdapter {
-    node: Arc<dyn NodeRuntime>,
+    node: NodeRuntime,
     languages: Arc<LanguageRegistry>,
     workspace_config: OnceLock<Value>,
 }
 
 impl JsonLspAdapter {
-    pub fn new(node: Arc<dyn NodeRuntime>, languages: Arc<LanguageRegistry>) -> Self {
+    pub fn new(node: NodeRuntime, languages: Arc<LanguageRegistry>) -> Self {
         Self {
             node,
             languages,
@@ -183,14 +183,14 @@ impl LspAdapter for JsonLspAdapter {
         container_dir: PathBuf,
         _: &dyn LspAdapterDelegate,
     ) -> Option<LanguageServerBinary> {
-        get_cached_server_binary(container_dir, &*self.node).await
+        get_cached_server_binary(container_dir, &self.node).await
     }
 
     async fn installation_test_binary(
         &self,
         container_dir: PathBuf,
     ) -> Option<LanguageServerBinary> {
-        get_cached_server_binary(container_dir, &*self.node).await
+        get_cached_server_binary(container_dir, &self.node).await
     }
 
     async fn initialization_options(
@@ -226,7 +226,7 @@ impl LspAdapter for JsonLspAdapter {
 
 async fn get_cached_server_binary(
     container_dir: PathBuf,
-    node: &dyn NodeRuntime,
+    node: &NodeRuntime,
 ) -> Option<LanguageServerBinary> {
     maybe!(async {
         let mut last_version_dir = None;