pylsp: Prefer version from user venv (#21069)

Closes #ISSUE

Release Notes:

- pylsp will now use version installed in user venv, if one is
available.

crates/language/src/language.rs

@@ -201,13 +201,14 @@ impl CachedLspAdapter {
     pub async fn get_language_server_command(
         self: Arc<Self>,
         delegate: Arc<dyn LspAdapterDelegate>,
+        toolchains: Arc<dyn LanguageToolchainStore>,
         binary_options: LanguageServerBinaryOptions,
         cx: &mut AsyncAppContext,
     ) -> Result<LanguageServerBinary> {
         let cached_binary = self.cached_binary.lock().await;
         self.adapter
             .clone()
-            .get_language_server_command(delegate, binary_options, cached_binary, cx)
+            .get_language_server_command(delegate, toolchains, binary_options, cached_binary, cx)
             .await
     }
 
@@ -281,6 +282,7 @@ pub trait LspAdapter: 'static + Send + Sync {
     fn get_language_server_command<'a>(
         self: Arc<Self>,
         delegate: Arc<dyn LspAdapterDelegate>,
+        toolchains: Arc<dyn LanguageToolchainStore>,
         binary_options: LanguageServerBinaryOptions,
         mut cached_binary: futures::lock::MutexGuard<'a, Option<LanguageServerBinary>>,
         cx: &'a mut AsyncAppContext,
@@ -298,7 +300,7 @@ pub trait LspAdapter: 'static + Send + Sync {
             // because we don't want to download and overwrite our global one
             // for each worktree we might have open.
             if binary_options.allow_path_lookup {
-                if let Some(binary) = self.check_if_user_installed(delegate.as_ref(), cx).await {
+                if let Some(binary) = self.check_if_user_installed(delegate.as_ref(), toolchains, cx).await {
                     log::info!(
                         "found user-installed language server for {}. path: {:?}, arguments: {:?}",
                         self.name().0,
@@ -357,6 +359,7 @@ pub trait LspAdapter: 'static + Send + Sync {
     async fn check_if_user_installed(
         &self,
         _: &dyn LspAdapterDelegate,
+        _: Arc<dyn LanguageToolchainStore>,
         _: &AsyncAppContext,
     ) -> Option<LanguageServerBinary> {
         None
@@ -1665,6 +1668,7 @@ impl LspAdapter for FakeLspAdapter {
     async fn check_if_user_installed(
         &self,
         _: &dyn LspAdapterDelegate,
+        _: Arc<dyn LanguageToolchainStore>,
         _: &AsyncAppContext,
     ) -> Option<LanguageServerBinary> {
         Some(self.language_server_binary.clone())
@@ -1673,6 +1677,7 @@ impl LspAdapter for FakeLspAdapter {
     fn get_language_server_command<'a>(
         self: Arc<Self>,
         _: Arc<dyn LspAdapterDelegate>,
+        _: Arc<dyn LanguageToolchainStore>,
         _: LanguageServerBinaryOptions,
         _: futures::lock::MutexGuard<'a, Option<LanguageServerBinary>>,
         _: &'a mut AsyncAppContext,