[ DWDS ] Serve DevTools from DDS by default

In order to reduce the number of ways DevTools is served across the
ecosystem, we're working on serving DevTools from DDS by default in all
tools that spawn DDS.

This change exposes some new DDS related configuration options that
allow for specifying whether or not DevTools should be served via DDS
and whether or not an existing DevTools server should be used.

The `devToolsLauncher` parameter has been marked as deprecated as it
will be removed in a future major release, but will continue to act as
the default way to launch DevTools if it is provided. Other DDS related
properties that have been merged into the new
`DartDevelopmentServiceConfiguration` class are also marked as
deprecated.

Author: bkonyi

dwds/CHANGELOG.md

@@ -1,3 +1,11 @@
+## 25.1.0
+
+- Added `DartDevelopmentServiceConfiguration` to allow for configuring DDS behavior.
+- Added support for serving DevTools via DDS. This will become the sole method of serving
+  DevTools from DWDS in a future major release.
+- Deprecated `spawnDds`, `ddsPort`, and `devToolsLauncher` properties in `DebugSettings`.
+- Added `ddsConfiguration` to `DebugSettings`.
+
 ## 25.0.4
 
 ### Bug Fixes:

dwds/debug_extension/tool/build_extension.dart

@@ -20,8 +20,8 @@ import 'package:path/path.dart' as p;
 const _prodFlag = 'prod';
 
 void main(List<String> arguments) async {
-  final parser =
-      ArgParser()..addFlag(_prodFlag, negatable: true, defaultsTo: false);
+  final parser = ArgParser()
+    ..addFlag(_prodFlag, negatable: true, defaultsTo: false);
   final argResults = parser.parse(arguments);
 
   exitCode = await run(isProd: argResults[_prodFlag] as bool);
@@ -41,6 +41,7 @@ Future<int> run({required bool isProd}) async {
     '--output',
     'build',
     '--release',
+    '--delete-conflicting-outputs'
   ]);
   final compileExitCode = await _handleProcess(compileStep);
   // Terminate early if compilation failed: