Fix Chips with Tooltip throw an assertion when enabling or disabling (#138799)
fixes [Enabling or disabling a `Chip`/`RawChip` with a tooltip throws an exception](https://github.com/flutter/flutter/issues/138287)
### Code sample
<details>
<summary>expand to view the code sample</summary>
```dart
import 'package:flutter/material.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
bool isEnabled = true;
return MaterialApp(
home: Material(
child: Center(
child: StatefulBuilder(
builder: (BuildContext context, StateSetter setState) {
return Column(
mainAxisSize: MainAxisSize.min,
children: [
RawChip(
tooltip: 'This is a tooltip',
isEnabled: isEnabled,
label: const Text('RawChip'),
onPressed: isEnabled ? () {} : null,
),
const SizedBox(height: 20),
ElevatedButton(
onPressed: () {
setState(() {
isEnabled = !isEnabled;
});
},
child: Text('${isEnabled ? 'Disable' : 'Enable'} Chip'),
)
],
);
}),
),
),
);
}
}
```
</details>
e6d43ac6d4