[gardening] TSAN infra issues on MacOS

[mkustermann]

See this log

--- Command "vm" (took 06.000011s):
DART_CONFIGURATION=ReleaseTSANARM64 xcodebuild/ReleaseTSANARM64/dart -Dtest_runner.configuration=vm-tsan-mac-release-arm64 --ignore-unrecognized-flags --packages=/Volumes/Work/s/w/ir/.dart_tool/package_config.json /Volumes/Work/s/w/ir/tests/standalone/io/process_non_ascii_test.dart

exit code:
255

stdout:
unittest-suite-wait-for-done
exitCode:
-6
stdout:

stderr:
dyld[29326]: Library not loaded: @rpath/libclang_rt.tsan_osx_dynamic.dylib
  Referenced from: <4C4C44DB-5555-3144-A105-A477F68CC67D> /Volumes/Work/s/w/ir/xcodebuild/ReleaseTSANARM64/dart
  Reason: tried: 'buildtools/mac-arm64/clang/lib/clang/22/lib/darwin/libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/Volumes/Work/s/w/ir/xcodebuild/ReleaseTSANARM64/./libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/Volumes/Work/s/w/ir/xcodebuild/ReleaseTSANARM64/../../../libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/Volumes/Work/s/w/ir/xcodebuild/ReleaseTSANARM64/Frameworks/libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/Volumes/Work/s/w/ir/xcodebuild/ReleaseTSANARM64/libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/Volumes/Work/s/w/ir/cache/builder/sdk/buildtools/mac-arm64/clang/lib/clang/22/lib/darwin/libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Volumes/Work/s/w/ir/cache/builder/sdk/buildtools/mac-arm64/clang/lib/clang/22/lib/darwin/libclang_rt.tsan_osx_dynamic.dylib' (no such file), 'buildtools/mac-arm64/clang/lib/clang/22/lib/darwin/libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/Volumes/Work/s/w/ir/xcodebuild/ReleaseTSANARM64/./libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/Volumes/Work/s/w/ir/xcodebuild/ReleaseTSANARM64/../../../libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/Volumes/Work/s/w/ir/xcodebuild/ReleaseTSANARM64/Frameworks/libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/Volumes/Work/s/w/ir/xcodebuild/ReleaseTSANARM64/libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/Volumes/Work/s/w/ir/cache/builder/sdk/buildtools/mac-arm64/clang/lib/clang/22/lib/darwin/libclang_rt.tsan_osx_dynamic.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/Volumes/Work/s/w/ir/cache/builder/sdk/buildtools/mac-arm64/clang/lib/clang/22/lib/darwin/libclang_rt.tsan_osx_dynamic.dylib' (no such file)

stderr:
Unhandled exception:
Expect.equals(expected: <0>, actual: <-6>) fails.
#0      Expect._fail (package:expect/expect.dart:891:5)
#1      Expect._failNotEqual (package:expect/expect.dart:174:5)
#2      Expect.equals (package:expect/expect.dart:157:5)
#3      main.<anonymous closure> (file:///Volumes/Work/s/w/ir/tests/standalone/io/process_non_ascii_test.dart:44:12)
#4      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:948:45)
#5      Future._propagateToListeners (dart:async/future_impl.dart:977:13)
#6      Future._completeWithValue (dart:async/future_impl.dart:720:5)
#7      Future.wait.<anonymous closure> (dart:async/future.dart:554:23)
#8      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:948:45)
#9      Future._propagateToListeners (dart:async/future_impl.dart:977:13)
#10     Future._complete (dart:async/future_impl.dart:711:7)
#11     Stream.fold.<anonymous closure> (dart:async/stream.dart:1128:16)
#12     _RootZone.runGuarded (dart:async/zone.dart:1766:10)
#13     _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:434:13)
#14     _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:444:7)
#15     _BufferingStreamSubscription._close (dart:async/stream_impl.dart:333:7)
#16     _SinkTransformerStreamSubscription._close (dart:async/stream_transformers.dart:91:11)
#17     _EventSinkWrapper.close (dart:async/stream_transformers.dart:21:11)
#18     _StringAdapterSink.close (dart:convert/string_conversion.dart:241:11)
#19     _Utf8ConversionSink.close (dart:convert/string_conversion.dart:301:20)
#20     _ConverterStreamEventSink.close (dart:convert/chunked_conversion.dart:79:18)
#21     _SinkTransformerStreamSubscription._handleDone (dart:async/stream_transformers.dart:136:24)
#22     _RootZone.runGuarded (dart:async/zone.dart:1766:10)
#23     _BufferingStreamSubscription._sendDone.sendDone (dart:async/stream_impl.dart:434:13)
#24     _BufferingStreamSubscription._sendDone (dart:async/stream_impl.dart:444:7)
#25     _BufferingStreamSubscription._close (dart:async/stream_impl.dart:333:7)
#26     _SyncStreamControllerDispatch._sendDone (dart:async/stream_controller.dart:806:19)
#27     _StreamController._closeUnchecked (dart:async/stream_controller.dart:652:7)
#28     _StreamController.close (dart:async/stream_controller.dart:645:5)
#29     _Socket._onData (dart:io-patch/socket_patch.dart:2887:21)
#30     _RootZone.runUnaryGuarded (dart:async/zone.dart:1778:10)
#31     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:381:11)
#32     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:312:7)
#33     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:798:19)
#34     _StreamController._add (dart:async/stream_controller.dart:663:7)
#35     _StreamController.add (dart:async/stream_controller.dart:618:5)
#36     new _RawSocket.<anonymous closure> (dart:io-patch/socket_patch.dart:2325:33)
#37     _NativeSocket.issueReadEvent.issue (dart:io-patch/socket_patch.dart:1651:18)
#38     _microtaskLoop (dart:async/schedule_microtask.dart:40:35)
#39     _startMicrotaskLoop (dart:async/schedule_microtask.dart:49:5)
#40     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:127:13)
#41     _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:194:5)

--- Re-run this test:
python3 tools/test.py -n vm-tsan-mac-release-arm64 standalone/io/process_non_ascii_test

It seems to be missing some tsan shared libs

/cc @rmacnak-google