Fix ABI issue with TaskLocal.withValue and update ABI test

Author: DougGregor

stdlib/public/Concurrency/TaskLocal.swift

@@ -265,11 +265,11 @@ public final class TaskLocal<Value: Sendable>: Sendable, CustomStringConvertible
     return try await operation()
   }
 
+  @_silgen_name("$ss9TaskLocalC13withValueImpl_9operation4file4lineqd__xn_qd__yYaKXESSSutYaKlF")
   @inlinable
   @discardableResult
   @_unsafeInheritExecutor // internal for backwards compatibility; though may be able to be removed safely?
   @available(SwiftStdlib 5.1, *)
-  @backDeployed(before: SwiftStdlib 5.9)
   internal func _unsafeInheritExecutor_withValueImpl<R>(
     _ valueDuringOperation: __owned Value,
     operation: () async throws -> R,

test/api-digester/stability-concurrency-abi.test

@@ -118,6 +118,12 @@ Func TaskLocal.withValue(_:operation:file:line:) has parameter 1 type change fro
 Func TaskLocal.withValue(_:operation:file:line:) has parameter 1 type change from () throws -> τ_1_0 to () async throws -> τ_1_0
 Func TaskLocal.withValue(_:operation:file:line:) has parameter 2 type change from Swift.String to (any _Concurrency.Actor)?
 Func TaskLocal.withValue(_:operation:file:line:) has parameter 3 type change from Swift.UInt to Swift.String
+Func withTaskGroup(of:returning:body:) has parameter 2 type change from (inout _Concurrency.TaskGroup<τ_0_0>) async -> τ_0_1 to (any _Concurrency.Actor)?
+Func withThrowingTaskGroup(of:returning:body:) has been renamed to Func withThrowingTaskGroup(of:returning:isolation:body:)
+Func withThrowingTaskGroup(of:returning:body:) has mangled name changing from '_Concurrency.withThrowingTaskGroup<A, B where A: Swift.Sendable>(of: A.Type, returning: B.Type, body: (inout Swift.ThrowingTaskGroup<A, Swift.Error>) async throws -> B) async throws -> B' to '_Concurrency.withThrowingTaskGroup<A, B where A: Swift.Sendable>(of: A.Type, returning: B.Type, isolation: isolated Swift.Optional<Swift.Actor>, body: (inout Swift.ThrowingTaskGroup<A, Swift.Error>) async throws -> B) async throws -> B'
+Func withThrowingTaskGroup(of:returning:body:) has parameter 2 type change from (inout _Concurrency.ThrowingTaskGroup<τ_0_0, any Swift.Error>) async throws -> τ_0_1 to (any _Concurrency.Actor)?
+Func withTaskGroup(of:returning:body:) has been renamed to Func withTaskGroup(of:returning:isolation:body:)
+Func withTaskGroup(of:returning:body:) has mangled name changing from '_Concurrency.withTaskGroup<A, B where A: Swift.Sendable>(of: A.Type, returning: B.Type, body: (inout Swift.TaskGroup<A>) async -> B) async -> B' to '_Concurrency.withTaskGroup<A, B where A: Swift.Sendable>(of: A.Type, returning: B.Type, isolation: isolated Swift.Optional<Swift.Actor>, body: (inout Swift.TaskGroup<A>) async -> B) async -> B'
 
 // *** DO NOT DISABLE OR XFAIL THIS TEST. *** (See comment above.)