Merge pull request swiftlang#60570 from apple/pick-deprecate-cancelation-handler

🍒[5.7][Concurrency] Deprecate one of the cancellation handler overloads

Author: DougGregor

stdlib/public/BackDeployConcurrency/SourceCompatibilityShims.swift

@@ -54,6 +54,7 @@ extension TaskPriority {
 
 @available(SwiftStdlib 5.1, *)
 @_alwaysEmitIntoClient
+@available(*, deprecated, renamed: "withTaskCancellationHandler(operation:onCancel:)")
 public func withTaskCancellationHandler<T>(
   handler: @Sendable () -> Void,
   operation: () async throws -> T

stdlib/public/Concurrency/SourceCompatibilityShims.swift

@@ -54,6 +54,7 @@ extension TaskPriority {
 
 @available(SwiftStdlib 5.1, *)
 @_alwaysEmitIntoClient
+@available(*, deprecated, renamed: "withTaskCancellationHandler(operation:onCancel:)")
 public func withTaskCancellationHandler<T>(
   handler: @Sendable () -> Void,
   operation: () async throws -> T