Adding `com.apple.security.network.client` to signed MAS build entitlements breaks Electron

# Bug Report

## Problem

### What is expected to happen?

Electron runs the app as usual.

### What does actually happen?

Blank screen.

## Information

The app builds and works as expected without the `com.apple.security.network.client` entitlement:
```xml

com.apple.security.app-sandbox

com.apple.security.inherit

com.apple.security.cs.allow-jit

com.apple.security.cs.allow-unsigned-executable-memory

com.apple.security.cs.disable-library-validation

com.apple.security.cs.disable-executable-page-protection

```

But of course there is no network access, so when adding this:
```xml
com.apple.security.network.client

```

It breaks the app, just a blank screen. The logs are unhelpful from what I can see.

I've searched and tried everything I could possibly think of over the past week before making this issue. Many different configurations, provision profiles, cordova/electron versions, etc. Many days going in circles.

### Command or Code

`cordova build electron --release` (also `--debug`) on Mac for the Mac App Store.

I've tried many different `build.json` configs, but it currently looks like this:
```json
{
"electron": {
"mac": {
"package": [
"mas"
],
"signing": {
"release": {
"entitlements": "Entitlements.plist",
"entitlementsInherit": "EntitlementsInherit.plist",
"provisioningProfile": "embedded.provisionprofile",
"hardenedRuntime": false,
"gatekeeperAssess": false,
"asarUnpack": []
}
}
}
}
}
```

### Environment, Platform, Device

Mac OSX

### Version information

Relevant lines from package.json:
```json
{
"devDependencies": {
"cordova-android": "^9.0.0",
"cordova-electron": "git+https://github.com/apache/cordova-electron.git",
"cordova-ios": "^6.2.0",
"cordova-plugin-background-mode": "^0.7.3",
"cordova-plugin-badge": "^0.8.8",
"cordova-plugin-device": "^2.0.3",
"cordova-plugin-inappbrowser": "^5.0.0",
"cordova-plugin-local-notification": "^0.9.0-beta.2",
"cordova-plugin-network-information": "^2.0.2",
"cordova-plugin-purchase": "^10.5.3",
"cordova-plugin-whitelist": "^1.3.4"
}
}
```

I only just recently tried `cordova-electron` version via GitHub, was previously using v2 from NPM.

I'm on macOS Big Sur 11.2.3 if it makes any difference.

## Checklist

- [x] I searched for existing GitHub issues
- [x] I updated all Cordova tooling to most recent version
- [x] I included all the necessary information above

Start by reproducing `cordova build electron --release` on macOS with the supplied `build.json`, `Entitlements.plist`, and `EntitlementsInherit.plist`, comparing builds with and without `com.apple.security.network.client`. Inspect how the Electron MAS package applies these entitlement files; done means the signed MAS build launches normally with the required entitlement and no blank screen.

Written by the indexing model from the issue text.