[5.9] Disable taskgroup test on freestanding; they're not supported

[ktoso]

Cherry pick of: #66181

rdar://109899236

Since none of the task group APIs are usable in freestanding, disable this freshly added test there as well:

-- Testing: 24 of 16230 tests, 10 workers --
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_cancelAll_only_specific_group.swift (1 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_asynciterator_semantics.swift (2 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_cancel_parent_affects_group.swift (3 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_cancel_then_spawn.swift (4 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_discarding_neverConsumingTasks.swift (5 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_discarding_dontLeak_class_error.swift (6 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_dontLeakTasks.swift (7 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_task_locals_prevent_illegal_use_taskgroup.swift (8 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_discarding_dontLeak.swift (9 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_next_not_invoked_cancelAll.swift (10 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_cancel_then_completions.swift (11 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/taskgroup_cancelAll_cancellationHandler.swift (12 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_next_not_invoked_without_cancelAll.swift (13 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_discarding.swift (14 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_next_on_pending.swift (15 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_is_empty.swift (16 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_throw_recover.swift (17 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/taskgroup_cancelAll_from_child.swift (18 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_task_locals_prevent_illegal_use_discarding_taskgroup.swift (19 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_throw_rethrow.swift (20 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_task_cancellation_taskGroup.swift (21 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_next_on_completed.swift (22 of 24)
UNSUPPORTED: Swift(freestanding-x86_64) :: Sanitizers/tsan/async_taskgroup_next.swift (23 of 24)
PASS: Swift(freestanding-x86_64) :: Concurrency/Runtime/async_taskgroup_is_asyncsequence.swift (24 of 24)

[ktoso]

@swift-ci please test and merge

[tbkka]

Are you sure we should remove this line? Does this test really run on Linux and Windows?

[ktoso]

Yes, this is actually on purpose, but I did miss removing the import Darwin 😮‍💨 (that wasn't used, fixed now).

The reason for macos here is explained in the TODO above: // TODO: move to target-run-simple-leaks-swift once CI is using at least Xcode 14.3 so there's a new way to tests for leaks, but only Xcode 14.3 seems to be reliable enough in reporting them, so once we do that we can make this test use leaks and require macos

[ktoso]

@swift-ci please test

[hamishknight]

Merging to fix CI