Merge pull request swiftlang#38477 from varungandhi-apple/vg-deprecate-old-sleep

[Concurrency] Deprecate Task.sleep(_:) in favor of Task.sleep(nanoseconds:).

Author: varungandhi-apple

stdlib/public/Concurrency/TaskSleep.swift

@@ -14,10 +14,7 @@ import Swift
 
 @available(SwiftStdlib 5.5, *)
 extension Task where Success == Never, Failure == Never {
-  /// Suspends the current task for _at least_ the given duration
-  /// in nanoseconds.
-  ///
-  /// This function does _not_ block the underlying thread.
+  @available(*, deprecated, renamed: "Task.sleep(nanoseconds:)")
   public static func sleep(_ duration: UInt64) async {
     return await Builtin.withUnsafeContinuation { (continuation: Builtin.RawUnsafeContinuation) -> Void in
       let job = _taskCreateNullaryContinuationJob(

test/Concurrency/async_task_groups.swift

@@ -13,7 +13,7 @@ func asyncThrowsOnCancel() async throws -> Int {
   // terrible suspend-spin-loop -- do not do this
   // only for purposes of demonstration
   while Task.isCancelled {
-    await Task.sleep(1_000_000_000)
+    try? await Task.sleep(nanoseconds: 1_000_000_000)
   }
 
   throw CancellationError()