Disable flutter_desktop_darwin_unittests on arm64

Author: zanderso

testing/run_tests.py

@@ -505,7 +505,8 @@ def make_test(name, flags=None, extra_env=None):
     # flutter_desktop_darwin_unittests uses global state that isn't handled
     # correctly by gtest-parallel.
     # https://github.com/flutter/flutter/issues/104789
-    if not os.path.basename(build_dir).startswith('host_debug'):
+    variant = os.path.basename(build_dir)
+    if not variant.startswith('host_debug') and 'arm64' not in variant:
       # Test is disabled for flaking in debug runs:
       # https://github.com/flutter/flutter/issues/127441
       run_engine_executable(