Update `CircleAvatar` & `DataTable` tests for Material 3 (#135901)

Updated unit tests for `CircleAvatar` & `DataTable` to have M2 and M3 versions.

More info in #127064

packages/flutter/test/material/circle_avatar_test.dart

@@ -146,8 +146,8 @@ void main() {
     expect(paragraph.text.style!.color, equals(foregroundColor));
   });
 
-  testWidgetsWithLeakTracking('CircleAvatar default colors', (WidgetTester tester) async {
-    final ThemeData theme = ThemeData(useMaterial3: true);
+  testWidgetsWithLeakTracking('Material3 - CircleAvatar default colors', (WidgetTester tester) async {
+    final ThemeData theme = ThemeData();
     await tester.pumpWidget(
       wrap(
         child: Theme(
@@ -286,7 +286,7 @@ void main() {
     // support is deprecated and the APIs are removed, these tests
     // can be deleted.
 
-    testWidgetsWithLeakTracking('CircleAvatar default colors with light theme', (WidgetTester tester) async {
+    testWidgetsWithLeakTracking('Material2 - CircleAvatar default colors with light theme', (WidgetTester tester) async {
       final ThemeData theme = ThemeData(useMaterial3: false, primaryColor: Colors.grey.shade100);
       await tester.pumpWidget(
         wrap(
@@ -308,7 +308,7 @@ void main() {
       expect(paragraph.text.style!.color, equals(theme.primaryTextTheme.titleLarge!.color));
     });
 
-    testWidgetsWithLeakTracking('CircleAvatar default colors with dark theme', (WidgetTester tester) async {
+    testWidgetsWithLeakTracking('Material2 - CircleAvatar default colors with dark theme', (WidgetTester tester) async {
       final ThemeData theme = ThemeData(useMaterial3: false, primaryColor: Colors.grey.shade800);
       await tester.pumpWidget(
         wrap(

packages/flutter/test/material/data_table_test.dart

@@ -1651,7 +1651,7 @@ void main() {
     expect(lastTableRowBoxDecoration().color, disabledColor);
   });
 
-  testWidgetsWithLeakTracking('DataRow renders custom colors when pressed', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Material2 - DataRow renders custom colors when pressed', (WidgetTester tester) async {
     const Color pressedColor = Color(0xff4caf50);
     Widget buildTable() {
       return DataTable(
@@ -1691,6 +1691,53 @@ void main() {
     await gesture.up();
   });
 
+  testWidgetsWithLeakTracking('Material3 - DataRow renders custom colors when pressed', (WidgetTester tester) async {
+    const Color pressedColor = Color(0xff4caf50);
+    Widget buildTable() {
+      return DataTable(
+        columns: const <DataColumn>[
+          DataColumn(
+            label: Text('Column1'),
+          ),
+        ],
+        rows: <DataRow>[
+          DataRow(
+            color: MaterialStateProperty.resolveWith<Color>(
+              (Set<MaterialState> states) {
+                if (states.contains(MaterialState.pressed)) {
+                  return pressedColor;
+                }
+                return Colors.transparent;
+              },
+            ),
+            onSelectChanged: (bool? value) {},
+            cells: const <DataCell>[
+              DataCell(Text('Content1')),
+            ],
+          ),
+        ],
+      );
+    }
+
+    await tester.pumpWidget(MaterialApp(
+      theme: ThemeData(),
+      home: Material(child: buildTable()),
+    ));
+
+    final TestGesture gesture = await tester.startGesture(tester.getCenter(find.text('Content1')));
+    await tester.pump(const Duration(milliseconds: 200)); // splash is well underway
+    final RenderBox box = Material.of(tester.element(find.byType(InkWell)))as RenderBox;
+    // Material 3 uses the InkSparkle which uses a shader, so we can't capture
+    // the effect with paint methods.
+    expect(
+      box,
+      paints
+        ..rect()
+        ..rect(rect: const Rect.fromLTRB(0.0, 56.0, 800.0, 104.0), color: pressedColor.withOpacity(0.0)),
+    );
+    await gesture.up();
+  });
+
   testWidgetsWithLeakTracking('DataTable can render inside an AlertDialog', (WidgetTester tester) async {
     await tester.pumpWidget(
       MaterialApp(