flaky macos CI about wasm

[modulovalue]

Code coverage seems to be flaky as well:

===== CRASH =====
si_signo=Segmentation fault(11), si_code=1, si_addr=0x13
version=2.19.0-421.0.dev (dev) (Tue Nov 22 15:11:36 2022 -0800) on "linux_x64"
pid=6255, thread=6325, isolate_group=main(0x55c820071000), isolate=(nil)((nil))
os=linux, arch=x64, comp=no, sim=no
isolate_instructions=55c81c39de20, vm_instructions=55c81c39de20
  pc 0x00007f30ef08be1f fp 0x00007f2de26fdc40 wasm_trap_delete+0xf
  pc 0x000055c81c53d94d fp 0x00007f2de26fdca0 dart::Isolate::LowLevelCleanup(dart::Isolate*)+0x21d
  pc 0x000055c81c53f0b9 fp 0x00007f2de26fe6d0 dart::Isolate::Shutdown()+0x1c9
  pc 0x000055c81caa9bf5 fp 0x00007f2de26fec10 Dart_ShutdownIsolate+0x1a5
  pc 0x000055c81c564ac8 fp 0x00007f2de26fec60 dart::MessageHandler::TaskCallback()+0x318
  pc 0x000055c81c[68](https://github.com/dart-lang/wasm/actions/runs/3564751161/jobs/5989091000#step:8:104)9dcb fp 0x00007f2de26fece0 dart::ThreadPool::WorkerLoop(dart::ThreadPool::Worker*)+0x13b
  pc 0x000055c81c68a218 fp 0x00007f2de26fed10 dart::ThreadPool::Worker::Main(unsigned long)+0x[78](https://github.com/dart-lang/wasm/actions/runs/3564751161/jobs/5989091000#step:8:114)
  pc 0x000055c81c600946 fp 0x00007f2de26fedd0 /opt/hostedtoolcache/dart-sdk/bin/dart+0x2213946
-- End of DumpStackTrace
Unhandled exception:
ProcessException: 
  Command: /opt/hostedtoolcache/dart-sdk/bin/dart run --pause-isolates-on-exit --disable-service-auth-codes --enable-vm-service=[81](https://github.com/dart-lang/wasm/actions/runs/3564751161/jobs/5989091000#step:8:117)81 test
#0      _dartRun (file:///home/runner/.pub-cache/hosted/pub.dev/coverage-1.6.1/bin/test_with_coverage.dart:35:5)
<asynchronous suspension>

[modulovalue]

Ubuntu:

✅ test/fn_import_exception_test.dart: exception thrown from imported function
libunwind: __unw_add_dynamic_fde: bad fde: FDE is really a CIE
✅ test/import_error_test.dart: bad imports
libunwind: __unw_add_dynamic_fde: bad fde: FDE is really a CIE
✅ test/hello_wasi_test.dart: hello wasi
libunwind: __unw_add_dynamic_fde: bad fde: FDE is really a CIE
✅ test/fn_call_error_test.dart: function with wrong arguments
/home/runner/work/_temp/9de3b8ea-3bbf-4867-b4d7-a90906f17cf2.sh: line 1:  6524 Segmentation fault      (core dumped) dart test
Error: Process completed with exit code 1[39](https://github.com/dart-lang/wasm/actions/runs/3536553910/jobs/5935683633#step:7:54).

I'm going to assume this is a duplicate of #90