[gardening] Skip vm/dart{,_2}/isolates/fast_object_copy_test on sim* due to timeout

Closes dart-lang/sdk#46740

TEST=ci

Change-Id: I076dcad6c1492c755c76ff6258ba0ad6935b1877
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/245364
Reviewed-by: Daco Harkes <[email protected]>
Commit-Queue: Martin Kustermann <[email protected]>

Author: mkustermann

runtime/tests/vm/vm.status

@@ -260,14 +260,14 @@ cc/IsolateReload_LibraryLookup: Fail, Crash
 dart/appjit*: SkipSlow # DFE too slow
 dart/b162922506_test: SkipSlow # Generates large input file
 dart/data_uri_spawn_test: Skip # Please triage.
-dart/isolates/fast_object_copy_test*: Slow # issue 46740
+dart/isolates/fast_object_copy_test*: SkipSlow
 dart/minimal_kernel_test: SkipSlow # gen_kernel is too slow on simulated architectures
 dart/null_safety_autodetection_in_kernel_compiler_test: SkipSlow # gen_kernel is too slow on simulated architectures
 dart/snapshot_version_test: RuntimeError # Please triage.
 dart_2/appjit*: SkipSlow # DFE too slow
 dart_2/b162922506_test: SkipSlow # Generates large input file
 dart_2/data_uri_spawn_test: Skip # Please triage.
-dart_2/isolates/fast_object_copy_test*: Slow # issue 46740
+dart_2/isolates/fast_object_copy_test*: SkipSlow
 dart_2/minimal_kernel_test: SkipSlow # gen_kernel is too slow on simulated architectures
 dart_2/null_safety_autodetection_in_kernel_compiler_test: SkipSlow # gen_kernel is too slow on simulated architectures
 dart_2/snapshot_version_test: RuntimeError # Please triage.