fixes [Chip widget's avatar padding changing if label text is more than 1 line](https://github.com/flutter/flutter/issues/136892)

### Code sample

<details>
<summary>expand to view the code sample</summary> 

```dart
import 'package:flutter/material.dart';

List<String> strings = [
  'hello good morning',
  'hello good morning hello good morning',
  'hello good morning hello good morning hello good morning'
];

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: [
              Column(
                mainAxisSize: MainAxisSize.min,
                crossAxisAlignment: CrossAxisAlignment.center,
                children: [
                  const Text(
                      'avatarBoxConstraints: null \ndeleteIconBoxConstraints: null',
                      textAlign: TextAlign.center),
                  for (String string in strings)
                    Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: RawChip(
                        label: Container(
                          width: 150,
                          color: Colors.amber,
                          child: Text(
                            string,
                            maxLines: 3,
                            overflow: TextOverflow.ellipsis,
                          ),
                        ),
                        avatar: const Icon(Icons.settings),
                        onDeleted: () {},
                      ),
                    ),
                ],
              ),
              Column(
                mainAxisSize: MainAxisSize.min,
                crossAxisAlignment: CrossAxisAlignment.center,
                children: [
                  const Text(
                      'avatarBoxConstraints: BoxConstraints.tightForFinite() \ndeleteIconBoxConstraints: BoxConstraints.tightForFinite()',
                      textAlign: TextAlign.center),
                  for (String string in strings)
                    Padding(
                      padding: const EdgeInsets.all(8.0),
                      child: RawChip(
                        avatarBoxConstraints:
                            const BoxConstraints.tightForFinite(),
                        deleteIconBoxConstraints:
                            const BoxConstraints.tightForFinite(),
                        label: Container(
                          width: 150,
                          color: Colors.amber,
                          child: Text(
                            string,
                            maxLines: 3,
                            overflow: TextOverflow.ellipsis,
                          ),
                        ),
                        avatar: const Icon(Icons.settings),
                        onDeleted: () {},
                      ),
                    ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }
}

```

</details>

### Preview
![Screenshot 2024-02-12 at 14 58 35](https://github.com/flutter/flutter/assets/48603081/5724bd07-7ac7-4987-b992-fa3ab8488273)

# Example previews
![Screenshot 2024-02-12 at 22 15 14](https://github.com/flutter/flutter/assets/48603081/33af472d-3561-47d4-8d0d-e1628de1e0aa)
![Screenshot 2024-02-12 at 22 15 46](https://github.com/flutter/flutter/assets/48603081/3de78b59-5cb6-4fd8-879b-8e204aacb069)