Split "_Driver" tests to separate test files.

pkg/analyzer/test/generated/error_suppression_test.dart

Index: pkg/analyzer/test/generated/error_suppression_test.dart
diff --git a/pkg/analyzer/test/generated/error_suppression_test.dart b/pkg/analyzer/test/generated/error_suppression_test.dart
index ea353b254d468918021533c66bacb5b9ebf93466..62d525e9bd70bf93cb18011804d774354fd2cd64 100644
--- a/pkg/analyzer/test/generated/error_suppression_test.dart
+++ b/pkg/analyzer/test/generated/error_suppression_test.dart
@@ -12,7 +12,6 @@ import 'resolver_test_case.dart';
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(ErrorSuppressionTest);
-    defineReflectiveTests(ErrorSuppressionTest_Driver);
   });
 }
 
@@ -197,9 +196,3 @@ const y = x; //CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE
     ]);
   }
 }
-
-@reflectiveTest
-class ErrorSuppressionTest_Driver extends ErrorSuppressionTest {
-  @override
-  bool get enableNewAnalysisDriver => true;
-}