[messages] Move contents of error_code_info.dart into analyzer_utilities.

Moves all the code from
`pkg/analyzer/tool/messages/error_code_info.dart` into
`pkg/analyzer_utilities/lib/analyzer_messages.dart`. This code
describes the analyzer and linter diagnostic codes, and is used by
diagnostic message code generation logic.

Moving this code into `pkg/analyzer_utilities` will allow it to be
referenced by the front end and shared diagnostic code generators. In
a future CL, I will take advantage of this in order to validate
references to analyzer diagnostic codes in
`pkg/_fe_analyzer_shared/messages.yaml` and
`pkg/front_end/messages.yaml`.

Change-Id: I6a6a696412647b54908cba1cf41801eebcd09923
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/452480
Commit-Queue: Paul Berry <[email protected]>
Reviewed-by: Samuel Rawlins <[email protected]>
Reviewed-by: Konstantin Shcheglov <[email protected]>

Author: stereotype441

pkg/analyzer/test/verify_diagnostics_test.dart

@@ -6,12 +6,12 @@ import 'package:analyzer/diagnostic/diagnostic.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/utilities/package_config_file_builder.dart';
 import 'package:analyzer_testing/utilities/utilities.dart';
+import 'package:analyzer_utilities/analyzer_messages.dart';
 import 'package:analyzer_utilities/messages.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import '../tool/messages/error_code_documentation_info.dart';
-import '../tool/messages/error_code_info.dart';
 import 'src/dart/resolution/context_collection_resolution.dart';
 
 main() {

pkg/analyzer/tool/messages/generate.dart

@@ -19,11 +19,10 @@ library;
 import 'dart:convert';
 
 import 'package:analyzer_testing/package_root.dart' as pkg_root;
+import 'package:analyzer_utilities/analyzer_messages.dart';
 import 'package:analyzer_utilities/messages.dart';
 import 'package:analyzer_utilities/tools.dart';
 
-import 'error_code_info.dart';
-
 Future<void> main() async {
   await GeneratedContent.generateAll(pkg_root.packageRoot, allTargets);
 }

pkg/analyzer/tool/messages/generate_test.dart

@@ -6,10 +6,10 @@
 // date.
 
 import 'package:analyzer_testing/package_root.dart' as pkg_root;
+import 'package:analyzer_utilities/analyzer_messages.dart';
 import 'package:analyzer_utilities/generated_content_check.dart';
 import 'package:path/path.dart';
 
-import 'error_code_info.dart';
 import 'generate.dart';
 
 Future<void> main() async {

pkg/analyzer/tool/messages/error_code_info.dart renamed to pkg/analyzer_utilities/lib/analyzer_messages.dart

@@ -1,4 +1,4 @@
-// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
+// Copyright (c) 2025, the Dart project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 

pkg/linter/tool/generate_lints.dart

@@ -7,10 +7,10 @@
 library;
 
 import 'package:analyzer_testing/package_root.dart' as pkg_root;
+import 'package:analyzer_utilities/analyzer_messages.dart';
 import 'package:analyzer_utilities/messages.dart';
 import 'package:analyzer_utilities/tools.dart';
 
-import '../../analyzer/tool/messages/error_code_info.dart';
 import 'messages_info.dart';
 
 void main() async {