Default FittedBox's clipBehavior to none (#66700)

This is a continuation of https://github.com/flutter/flutter/pull/61366
after cl/333620714

See also https://flutter.dev/go/clip-behavior

packages/flutter/lib/src/widgets/basic.dart

@@ -1424,7 +1424,7 @@ class FittedBox extends SingleChildRenderObjectWidget {
     Key? key,
     this.fit = BoxFit.contain,
     this.alignment = Alignment.center,
-    this.clipBehavior = Clip.hardEdge,
+    this.clipBehavior = Clip.none,
     Widget? child,
   }) : assert(fit != null),
        assert(alignment != null),
@@ -1452,7 +1452,7 @@ class FittedBox extends SingleChildRenderObjectWidget {
 
   /// {@macro flutter.widgets.Clip}
   ///
-  /// Defaults to [Clip.hardEdge].
+  /// Defaults to [Clip.none].
   final Clip clipBehavior;
 
   @override

packages/flutter/test/widgets/fitted_box_test.dart

@@ -481,7 +481,7 @@ void main() {
   testWidgets('Can set and update clipBehavior', (WidgetTester tester) async {
     await tester.pumpWidget(FittedBox(fit: BoxFit.none, child: Container()));
     final RenderFittedBox renderObject = tester.allRenderObjects.whereType<RenderFittedBox>().first;
-    expect(renderObject.clipBehavior, equals(Clip.hardEdge));
+    expect(renderObject.clipBehavior, equals(Clip.none));
 
     await tester.pumpWidget(FittedBox(fit: BoxFit.none, child: Container(), clipBehavior: Clip.antiAlias));
     expect(renderObject.clipBehavior, equals(Clip.antiAlias));