chore: add a Mac App Store Private API Rejection template (#14009)

.github/ISSUE_TEMPLATE/mac-app-store-private-api-rejection.md

@@ -0,0 +1,13 @@
+---
+name: Mac App Store Private API Rejection
+about: Your app was rejected from the Mac App Store for using private API's
+
+---
+
+* Electron Version: 
+
+**Rejection Email**
+Paste the contents of your rejection email here, censoring any private information such as app names.
+
+**Additional Information**
+Add any other context about the problem here.