Repository: react-native
Issue: ScrollView scrollbar has spacing when parent has paddings
Labels: Component: ScrollView,Needs: Triage :mag:,Newer Patch Available

### Description

When adding padding for parent of `ScrollView` and/ or adding element before it, e.g. custom header, scroll bar has some padding on both top and bottom. This seems to be only happening with using only one of top or bottom safe area paddings.

This was initially discovered when i added custom padding for SafeAreaView so this can be also reproduced by wrapping `ScrollView` with `<SafeAreView edges=['top', 'left', 'right]>` or `<SafeAreView edges=['bottom', 'left', 'right]>` from [react-native-safe-area-context](https://www.npmjs.com/package/react-native-safe-area-context)

### Steps to reproduce

1. Create `View` with top spacing (either `margin` or `padding`)
2. Create `ScrollView` inside
3. Make `ScrollView` scrollable (e.g. by adding children)

### React Native Version

0.76.1

### Affected Platforms

Runtime - iOS

### Output of `npx react-native info`

```text
System:
  OS: macOS 15.0.1
  CPU: (8) x64 Apple M1 Pro
  Memory: 48.64 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 14.21.3
    path: ~/.nvm/versions/node/v14.21.3/bin/node
  Yarn:
    version: 3.6.4
    path: /opt/homebrew/bin/yarn
  npm:
    version: 6.14.18
    path: /opt/homebrew/bin/npm
  Watchman:
    version: 2024.11.04.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.14.3
    path: /usr/local/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.1
      - iOS 18.1
      - macOS 15.1
      - tvOS 18.1
      - visionOS 2.1
      - watchOS 11.1
  Android SDK: Not Found
IDEs:
  Android Studio: Not Found
  Xcode:
    version: 16.1/16B40
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 21.0.1
    path: /opt/homebrew/opt/openjdk/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 15.0.0
    wanted: 15.0.0
  react:
    installed: 18.3.1
    wanted: 18.3.1
  react-native:
    installed: 0.76.1
    wanted: 0.76.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: Not found
  newArchEnabled: Not found
iOS:
  hermesEnabled: true
  newArchEnabled: false
```


### Stacktrace or Logs

```text
-
```


### Reproducer

https://snack.expo.dev/@denissdubinin/scrollview-with-parent-spacing?platform=ios

### Screenshots and Videos

<img width="372" alt="Screenshot 2024-11-15 at 2 44 27 PM" src="https://github.com/user-attachments/assets/842d308b-123d-4dcc-8d96-ddd72db55444">

### Component
```
import { Text, View, ScrollView } from 'react-native';

const ITERATIONS = 50;

export default function App() {
  return (
    <View style={{marginTop: 59, backgroundColor: 'blue'}}>
      <View style={{height: 100, backgroundColor: 'green'}}>
        <Text>This is header</Text>
      </View>
      <ScrollView>
        <View style={{backgroundColor: 'red'}}>
          { [...Array(ITERATIONS)].map(i => <Text key={ i }>Iteration { i }</Text>) }
        </View>
        </ScrollView>
      </View>
  );
}
```