[iOS] Strange gradient appears when using `borderTopLeftRadius` (or similar) inside a scaled `View`

Description

See snack reproduction: https://snack.expo.dev/@whiteroseeducation/ios-bordertopleftradius-gradient-issue

The issue only appears on iOS devices.

When two conditions are met, you see weird gradients near the corners. These conditions are:

1. The View has style which sets the border corners to different radius values, e.g. with borderTopLeftRadius.
2. The View is nested in a View which has a shrinking scale transform.

E.g.

<View
  style={{
    width: 400,
    height: 400,
    transform: [{ scale: 0.5 }],
  }}>
  <View
    style={{
      width: '100%',
      height: '100%',
      backgroundColor: 'white',
      borderColor: 'navy',
      borderWidth: 8,
      borderTopLeftRadius: 40,
    }}
  />
</View>

Steps to reproduce

1. Click snack link above
2. Run on an iOS device or simulator
3. Observe that the first shape (labelled "The issue") has weird gradients in it, which aren't specified by its style

React Native Version

0.76.7

Affected Platforms

Runtime - iOS

Reproducer

https://snack.expo.dev/@whiteroseeducation/ios-bordertopleftradius-gradient-issue

Screenshots and Videos

从链接的 Snack 复现开始，并使用 React Native 0.76.7 在 iOS 设备或模拟器上运行它。比较缩放后的外层 View 和带有 borderTopLeftRadius 的内层 View；当受影响的形状不再显示其 style 中不存在的渐变时，即表示完成。