Repository: flutter
Issue: CupertinoTextField autocorrect highlight vertically misaligned
Labels: platform-ios,P2,team-text-input,triaged-text-input

### Steps to reproduce

1. Run any app with a CupertinoTextField, such as the one below.
2. Type some text into the field and until autocorrect highlights it. If you can't trigger it, try a commonly misspelled word.

### Expected results

The text, cursor, and highlight are all aligned and fully covered.

### Actual results

The highlight appears to be too high. The text is not centered, and the cursor hangs below the highlight.


### Code sample

<details open><summary>Code sample</summary>

```dart
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatelessWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: const <Widget>[
            Padding(
              padding: EdgeInsets.symmetric(horizontal: 32.0),
              child: CupertinoTextField(),
            ),
          ],
        ),
      ),
    );
  }
}
```

</details>


### Screenshots or Video

<img width="400" alt="ios_big" src="https://github.com/flutter/flutter/assets/389558/953f9785-eb63-439f-8405-dba4cdbb9273">


<details>

<summary>More pictures</summary>

Flutter on iOS (unscaled)

<img width="121" alt="Screenshot 2024-06-25 at 5 07 56 PM" src="https://github.com/flutter/flutter/assets/389558/b41ee8a6-d76f-49e5-9c99-824798b48e32">

Some other platforms

<img width="297" alt="selection_alignment" src="https://github.com/flutter/flutter/assets/389558/e905adb4-5bc4-4e91-964a-554b4a0f8ba5">

</details>

### Logs

_No response_

### Flutter Doctor output

<details open><summary>Doctor output</summary>

```console
[!] Flutter (Channel master, 3.23.0-13.0.pre.335, on macOS 14.5 23F79 darwin-arm64, locale en)
    ! Unknown upstream repository.
      Reinstall Flutter by following instructions at https://flutter.dev/docs/get-started/install.
[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 15.3)
[✓] Chrome - develop for the web
[!] Android Studio (version unknown)
    ✗ Unable to determine Android Studio version.
[✓] Android Studio (version 2023.2)
[✓] Connected device (3 available)
    ! Error: Browsing on the local area network for Bella’s iPad. Ensure the device is unlocked and attached with a cable or associated with the same local area network as this Mac.
      The device must be opted into Developer Mode to connect wirelessly. (code -27)
[✓] Network resources

! Doctor found issues in 2 categories.
```

</details>

Reproduced on an iOS 17.4 simulator.