[flutter_tool] experimental resident web runner is not debuggable (#46916)

packages/flutter_tools/lib/src/build_runner/resident_web_runner.dart

@@ -360,6 +360,9 @@ class _ExperimentalResidentWebRunner extends ResidentWebRunner {
           dartDefines: dartDefines,
         );
 
+  @override
+  bool get debuggingEnabled => false;
+
   @override
   Future<int> run({
     Completer<DebugConnectionInfo> connectionInfoCompleter,

packages/flutter_tools/test/general.shard/resident_web_runner_test.dart

@@ -486,6 +486,12 @@ void main() {
     FeatureFlags: () => TestFeatureFlags(isWebIncrementalCompilerEnabled: true),
   }));
 
+  test('experimental resident runner is not debuggable', () => testbed.run(() {
+    expect(residentWebRunner.debuggingEnabled, false);
+  }, overrides: <Type, Generator>{
+    FeatureFlags: () => TestFeatureFlags(isWebIncrementalCompilerEnabled: true),
+  }));
+
   test('Can hot restart after attaching', () => testbed.run(() async {
     _setupMocks();
     final Completer<DebugConnectionInfo> connectionInfoCompleter = Completer<DebugConnectionInfo>();