[Utils] Hide the default behavior change of D68819 under a flag

[jdoerfert]

Summary

With D69701, the options used when running the script on a file will be
recorded and reused on a rerun. This allows us to hide new features
behind flags, starting with the "define" that was introduced in D68819.

[xbolva00]

+1

[jdoerfert]

closed in e67f6477fd1e