Customize `GoogleService-Info.plist` target membership

Hello,
I have used XcodeGen the Great 🥇 in our application and it works flawlessly unless there is one little issue with GoogleService-Info.plist files.
I have three GoogleService-Info.plist files, each related to a separate application environment (develop, stage, and production) and I have to use them in a single Xcode target. Following is the MyApp structure.

targets:
  MyApp:
    type: application
    platform: iOS
    sources:
      - path: MyApp
      - path: MyApp/Resources/GoogleService-Infos/DEV/GoogleService-Info.plist
        buildPhase: none
      - path: MyApp/Resources/GoogleService-Infos/INT/GoogleService-Info.plist
        buildPhase: none
      - path: MyApp/Resources/GoogleService-Infos/PROD/GoogleService-Info.plist
        buildPhase: none

I added a script in the build phases to select the proper Info.plist file and then copy it inside my app's bundle directory. In this case, I have to set an unselected target membership on them and don't need to have them on copy bundle sources inside build phases.

I tried to set buildphases: none for them but it didn't work. This note inside the project spec > buildPhase already mentioned it I guess Note that Info.plist files will never be added to any build phases, no matter what this setting is..

      - path: Source/Resources/GoogleService-Infos/INT/GoogleService-Info.plist
        buildPhase: none

I'm using the 2.38.0 version of XcodeGen.
I'm encountering the opposite case of #1045 please help me THX. 🙏

Start with Docs/ProjectSpec.md's target source and buildPhase guidance, then trace how XcodeGen handles the three GoogleService-Info.plist paths in the DEV/INT/PROD example. Done means target membership can be customized so these files remain outside build phases while the requested single-target setup works.