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/python.rs

@@ -26,13 +26,13 @@ fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
 }
 
 pub struct PythonLspAdapter {
-    node: Arc<dyn NodeRuntime>,
+    node: NodeRuntime,
 }
 
 impl PythonLspAdapter {
     const SERVER_NAME: LanguageServerName = LanguageServerName::new_static("pyright");
 
-    pub fn new(node: Arc<dyn NodeRuntime>) -> Self {
+    pub fn new(node: NodeRuntime) -> Self {
         PythonLspAdapter { node }
     }
 }
@@ -94,14 +94,14 @@ impl LspAdapter for PythonLspAdapter {
         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 process_completions(&self, items: &mut [lsp::CompletionItem]) {
@@ -198,7 +198,7 @@ impl LspAdapter for PythonLspAdapter {
 
 async fn get_cached_server_binary(
     container_dir: PathBuf,
-    node: &dyn NodeRuntime,
+    node: &NodeRuntime,
 ) -> Option<LanguageServerBinary> {
     let server_path = container_dir.join(SERVER_PATH);
     if server_path.exists() {