[0.71.0-rc.3] Redundant margin when using either rowGap or gap

Description

gap/rowGap adds an unwanted gutter (space) to the last layout element.

Version

0.71.0-rc.3

Output of npx react-native info

System:
    OS: macOS 13.0
    CPU: (10) arm64 Apple M1 Max
    Memory: 159.22 MB / 64.00 GB
    Shell: 5.8.1 - /bin/zsh
  Binaries:
    Node: 16.14.0 - /usr/local/bin/node
    Yarn: 1.22.18 - /usr/local/bin/yarn
    npm: 8.9.0 - /opt/homebrew/bin/npm
    Watchman: 2022.09.05.00 - /opt/homebrew/bin/watchman
  Managers:
    CocoaPods: Not Found
  SDKs:
    iOS SDK:
      Platforms: DriverKit 21.4, iOS 16.0, macOS 12.3, tvOS 16.0, watchOS 9.0
    Android SDK:
      API Levels: 29, 30, 31, 32
      Build Tools: 29.0.2, 29.0.3, 30.0.2, 30.0.3, 31.0.0, 32.0.0, 32.1.0
      System Images: android-32 | Google APIs ARM 64 v8a
      Android NDK: Not Found
  IDEs:
    Android Studio: 2021.1 AI-211.7628.21.2111.8193401
    Xcode: 14.0.1/14A400 - /usr/bin/xcodebuild
  Languages:
    Java: 11.0.14.1 - /usr/bin/javac
  npmPackages:
    @react-native-community/cli: Not Found
    react: 18.2.0 => 18.2.0
    react-native: 0.71.0-rc.3 => 0.71.0-rc.3
    react-native-macos: Not Found
  npmGlobalPackages:
    *react-native*: Not Found

Steps to reproduce

The code example below is self-explanatory.

Snack, code example, screenshot, or link to a repository

<View
  style={{
    gap: 16,
    backgroundColor: 'red',
  }}
>
  <View style={{ backgroundColor: 'yellow' }}>
    <Text>test1</Text>
  </View>
  <View style={{ backgroundColor: 'yellow' }}>
    <Text>test2</Text>
  </View>
  <View style={{ backgroundColor: 'yellow' }}>
    <Text>test3</Text>
  </View>
</View>

[NickGerleman]

I can try to reproduce soon. cc @jacobp100 @intergalacticspacehighway in case either of you can get to it first.

This one is kind of surprising to me given the test coverage.

[intergalacticspacehighway]

const bool isLastChild = i == collectedFlexItemsValues.endOfLineIndex - 1;
betweenMainDim -= isLastChild ? gap : 0;

This should fix it. I need to do a buck setup to run tests, did it a long ago, will try again 😅