[gardening] Marking evaluate_activation_test as slow.

The tests are flaky - going from (expected)RuntimeError to (unexpected)timeout.
BUG=https://github.com/dart-lang/sdk/issues/45124
TEST=ci

Change-Id: Ifd8aef25c47b983425afdf80e3ad64dcefc00415
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/306667
Reviewed-by: Ryan Macnak <rmacnak@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Auto-Submit: Alexander Aprelev <aam@google.com>
diff --git a/runtime/observatory/tests/service/service_kernel.status b/runtime/observatory/tests/service/service_kernel.status
index 3f3b80a..8d39e7b 100644
--- a/runtime/observatory/tests/service/service_kernel.status
+++ b/runtime/observatory/tests/service/service_kernel.status
@@ -25,8 +25,8 @@
 
 [ $compiler == dartk ]
 coverage_optimized_function_test: Pass, Slow
-evaluate_activation_test/instance: RuntimeError # http://dartbug.com/20047
-evaluate_activation_test/scope: RuntimeError # http://dartbug.com/20047
+evaluate_activation_test/instance: RuntimeError, Slow # http://dartbug.com/20047, http://dartbug.com/45124
+evaluate_activation_test/scope: RuntimeError, Slow # http://dartbug.com/20047, http://dartbug.com/45124
 pause_on_exception_from_slow_path_test: Pass, Slow
 pause_on_unhandled_async_exceptions2_test: Pass, Slow
 
diff --git a/runtime/observatory_2/tests/service_2/service_2_kernel.status b/runtime/observatory_2/tests/service_2/service_2_kernel.status
index 6dd58ce..80cd251 100644
--- a/runtime/observatory_2/tests/service_2/service_2_kernel.status
+++ b/runtime/observatory_2/tests/service_2/service_2_kernel.status
@@ -25,8 +25,8 @@
 
 [ $compiler == dartk ]
 coverage_optimized_function_test: Pass, Slow
-evaluate_activation_test/instance: RuntimeError # http://dartbug.com/20047
-evaluate_activation_test/scope: RuntimeError # http://dartbug.com/20047
+evaluate_activation_test/instance: RuntimeError, Slow # http://dartbug.com/20047, https://dartbug.com/45124
+evaluate_activation_test/scope: RuntimeError, Slow # http://dartbug.com/20047, https://dartbug.com/45124
 pause_on_exception_from_slow_path_test: Pass, Slow
 pause_on_unhandled_async_exceptions2_test: Pass, Slow