project: Use user configured shells for project env fetching (#41288)

Closes https://github.com/zed-industries/zed/issues/40464

Release Notes:

- Fix shell environment sourcing not respecting users remote shells

crates/editor/src/lsp_ext.rs

@@ -60,8 +60,10 @@ async fn lsp_task_context(
     buffer: &Entity<Buffer>,
     cx: &mut AsyncApp,
 ) -> Option<TaskContext> {
-    let worktree_store = project
-        .read_with(cx, |project, _| project.worktree_store())
+    let (worktree_store, environment) = project
+        .read_with(cx, |project, _| {
+            (project.worktree_store(), project.environment().clone())
+        })
         .ok()?;
 
     let worktree_abs_path = cx
@@ -74,9 +76,9 @@ async fn lsp_task_context(
         })
         .ok()?;
 
-    let project_env = project
-        .update(cx, |project, cx| {
-            project.buffer_environment(buffer, &worktree_store, cx)
+    let project_env = environment
+        .update(cx, |environment, cx| {
+            environment.buffer_environment(buffer, &worktree_store, cx)
         })
         .ok()?
         .await;