Merge pull request #36398 from aschwaighofer/xfail_concurrency_test_windows

Disable failing concurrency tests on windows

Author: nate-chandler

test/Concurrency/Runtime/async_task_handle_cancellation.swift

@@ -3,6 +3,8 @@
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 
+// XFAIL: OS=windows-msvc
+
 @main struct Main {
   static func main() async {
     let handle = Task.runDetached {

test/Concurrency/Runtime/async_taskgroup_throw_rethrow.swift

@@ -2,6 +2,7 @@
 
 // REQUIRES: executable_test
 // REQUIRES: concurrency
+// XFAIL: OS=windows-msvc
 
 struct Boom: Error {}
 struct IgnoredBoom: Error {}

test/IRGen/async/throwing.swift

@@ -6,6 +6,7 @@
 // REQUIRES: executable_test
 // REQUIRES: concurrency
 // UNSUPPORTED: use_os_stdlib
+// XFAIL: OS=windows-msvc
 
 struct E : Error {}