Replace the configuration map with a typed object.

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index 51f3e58135c2abf87387bf26bc7de6dc9f646cb9..ad7ea0f998478143e3a6bbea219601cc0b23f8c5 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -375,7 +375,7 @@ mirrors/null_test: Fail # Issue 16831
 [ $compiler == dart2js && $runtime == jsshell ]
 async/schedule_microtask_test: Fail  # Preamble file does not correctly implement scheduleImmediate.
 
-[ $compiler == dartanalyzer || $compiler == dart2analyzer ]
+[ $compiler == dart2analyzer ]
 mirrors/generic_f_bounded_mixin_application_test: StaticWarning # Test Issue
 
 mirrors/redirecting_factory_test/01: StaticWarning # test issue X, The return type 'Class<T2, T1>' of the redirected constructor is not assignable to 'Class<T1, T2>'
@@ -398,7 +398,7 @@ profiler/metrics_test: Fail # Issue 20309
 profiler/metrics_num_test: Fail # Issue 20309
 
 
-[ ($compiler == dartanalyzer || $compiler == dart2analyzer) && $checked ]
+[ $compiler == dart2analyzer && $checked ]
 mirrors/regress_16321_test/01: MissingCompileTimeError # Issue 16391
 
 [ $compiler == dart2analyzer && $builder_tag == strong ]