[gardening] Exclude standalone{,_2}/io/issue_32052_test from iso-stres

This test uses `dart:cli`s `waitFor` which only works under a flag now.

TEST=ci

Change-Id: I9efe139c868d12c6fa2af1c0d7bfa64a5af5b2a5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/326100
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Slava Egorov <vegorov@google.com>
diff --git a/runtime/tests/concurrency/stress_test_list.json b/runtime/tests/concurrency/stress_test_list.json
index 5e5c8d8..603120f 100644
--- a/runtime/tests/concurrency/stress_test_list.json
+++ b/runtime/tests/concurrency/stress_test_list.json
@@ -3281,7 +3281,6 @@
     "../../../tests/standalone/io/issue_26954_test.dart",
     "../../../tests/standalone/io/issue_30687_test.dart",
     "../../../tests/standalone/io/issue_31492_test.dart",
-    "../../../tests/standalone/io/issue_32052_test.dart",
     "../../../tests/standalone/io/locale_name_test.dart",
     "../../../tests/standalone/io/many_directory_operations_test.dart",
     "../../../tests/standalone/io/many_file_operations_test.dart",
@@ -6595,7 +6594,6 @@
     "../../../tests/standalone_2/io/issue_26954_test.dart",
     "../../../tests/standalone_2/io/issue_30687_test.dart",
     "../../../tests/standalone_2/io/issue_31492_test.dart",
-    "../../../tests/standalone_2/io/issue_32052_test.dart",
     "../../../tests/standalone_2/io/locale_name_test.dart",
     "../../../tests/standalone_2/io/many_directory_operations_test.dart",
     "../../../tests/standalone_2/io/many_file_operations_test.dart",