Add Task.sleep(for: Duration) (#59203)

* Add Task.sleep(for: Duration)

* Update TaskSleepDuration.swift

* Update stdlib/public/Concurrency/TaskSleepDuration.swift

Co-authored-by: Alex Martini <[email protected]>

* Update stdlib/public/Concurrency/TaskSleepDuration.swift

Co-authored-by: Alex Martini <[email protected]>

* Fix suggestion.

* Update stdlib/public/Concurrency/TaskSleepDuration.swift

Co-authored-by: Xiaodi Wu <[email protected]>

* Update stdlib/public/Concurrency/TaskSleepDuration.swift

Co-authored-by: Alex Martini <[email protected]>
Co-authored-by: Xiaodi Wu <[email protected]>

Author: 3 people

stdlib/public/Concurrency/TaskSleepDuration.swift

@@ -142,4 +142,19 @@ extension Task where Success == Never, Failure == Never {
   ) async throws {
     try await clock.sleep(until: deadline, tolerance: tolerance)
   }
+  
+  /// Suspends the current task for the given duration on a continuous clock.
+  ///
+  /// If the task is cancelled before the time ends, this function throws 
+  /// `CancellationError`.
+  ///
+  /// This function doesn't block the underlying thread.
+  ///
+  ///       try await Task.sleep(for: .seconds(3))
+  ///
+  /// - Parameter duration: The duration to wait.
+  @available(SwiftStdlib 5.7, *)
+  public static func sleep(for duration: Duration) async throws {
+    try await sleep(until: .now + duration, clock: .continuous)
+  }
 }