Replace std::sync::Mutex with parking_lot::Mutex in languages/src/python.rs (#29889)

This appears to be the only place `std::sync::Mutex` is used, Zed always
prefers `parking_lot`.

Release Notes:

- N/A

crates/languages/Cargo.toml

@@ -46,6 +46,7 @@ language.workspace = true
 log.workspace = true
 lsp.workspace = true
 node_runtime.workspace = true
+parking_lot.workspace = true
 paths.workspace = true
 pet-conda.workspace = true
 pet-core.workspace = true

crates/languages/src/python.rs

@@ -23,8 +23,8 @@ use serde_json::{Value, json};
 use smol::lock::OnceCell;
 use std::cmp::Ordering;
 
+use parking_lot::Mutex;
 use std::str::FromStr;
-use std::sync::Mutex;
 use std::{
     any::Any,
     borrow::Cow,
@@ -671,7 +671,6 @@ impl ToolchainLister for PythonToolchainProvider {
         let mut toolchains = reporter
             .environments
             .lock()
-            .ok()
             .map_or(Vec::new(), |mut guard| std::mem::take(&mut guard));
 
         let wr = worktree_root;
@@ -823,7 +822,7 @@ impl pet_core::os_environment::Environment for EnvironmentApi<'_> {
     }
 
     fn get_know_global_search_locations(&self) -> Vec<PathBuf> {
-        if self.global_search_locations.lock().unwrap().is_empty() {
+        if self.global_search_locations.lock().is_empty() {
             let mut paths =
                 std::env::split_paths(&self.get_env_var("PATH".to_string()).unwrap_or_default())
                     .collect::<Vec<PathBuf>>();
@@ -840,12 +839,9 @@ impl pet_core::os_environment::Environment for EnvironmentApi<'_> {
                 .filter(|p| p.exists())
                 .collect::<Vec<PathBuf>>();
 
-            self.global_search_locations
-                .lock()
-                .unwrap()
-                .append(&mut paths);
+            self.global_search_locations.lock().append(&mut paths);
         }
-        self.global_search_locations.lock().unwrap().clone()
+        self.global_search_locations.lock().clone()
     }
 }