Emojis inside <Text> increase line-height or stretch the element on iOS

Description

Reported previously in #18559. Emojis within <Text> elements are not aligned with other text in the same text element or other text elements on screen. They also cause the height of the <Text> to increase disproportionate to the fontSize.

As a workaround, the fontFamily of the emoji can be set to System. The referenced Snack shows this behavior. The emoji is rendered initially with the Menlo font family and overridden to System when the override button is pressed. When overridden, the strikethrough more closely aligns with the text, though is not perfectly aligned like on Android.

This issue no longer seems to be reproducible on Android.

Steps to reproduce

1. Launch the Snack
2. Note that the strikethrough does not align with the emoji nor the text to the right
3. Click Override
4. Note that the strikethrough more closely aligns with the emoji and the text on the right

React Native Version

0.76.1

Affected Platforms

Runtime - iOS

Output of npx react-native info

System:
  OS: macOS 14.7.1
  CPU: (16) arm64 Apple M3 Max
  Memory: 3.73 GB / 48.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 18.20.5
    path: /opt/homebrew/opt/node@18/bin/node
  Yarn:
    version: 1.22.22
    path: /opt/homebrew/bin/yarn
  npm:
    version: 10.8.2
    path: /opt/homebrew/opt/node@18/bin/npm
  Watchman:
    version: 2024.11.11.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/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: Not Found
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 15.1.2
    wanted: ^15.1.2
  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: Not found
  newArchEnabled: Not found

Stacktrace or Logs

None

Reproducer

https://snack.expo.dev/@mhoran/hazardous-orange-celery

Screenshots and Videos

Without override	With override

まず、リンクされた Snack を iOS で再現し、 内の絵文字の挙動を Menlo および System の fontFamily 設定で比較します。行の高さと配置を担う iOS のテキストレンダリング経路を追跡します。絵文字によってテキストが引き伸ばされたり配置がずれたりすることがなくなり、Android の挙動にリグレッションが発生しなければ完了です。