Always provide default task context (#10764)

Based on
https://github.com/zed-industries/zed/issues/8324?notification_referrer_id=NT_kwDOACkO1bI5NTk0NjM0NzkyOjI2OTA3NzM&notifications_query=repo%3Azed-industries%2Fzed+is%3Aunread#issuecomment-2065551553

Release Notes:

- Fixed certain files' task modal not showing context-based tasks

crates/language/src/task_context.rs

@@ -15,9 +15,9 @@ pub trait ContextProvider: Send + Sync {
     /// Builds a specific context to be placed on top of the basic one (replacing all conflicting entries) and to be used for task resolving later.
     fn build_context(
         &self,
-        _: Option<&Path>,
-        _: &Location,
-        _: &mut AppContext,
+        _worktree_abs_path: Option<&Path>,
+        _location: &Location,
+        _cx: &mut AppContext,
     ) -> Result<TaskVariables> {
         Ok(TaskVariables::default())
     }