Interactive tools prompt for confirmation and abort when no terminal is
attached, so unattended callers stall on 'Is this ok [y/N]:'. Add an
AssumeYes toggle, mirroring UseSudoWhenNeeded, that injects each manager's
non-interactive confirmation flag (-y, --noconfirm, --non-interactive) into
Install, Remove, Upgrade, InstallFile, and UpgradeAll. A flag already
supplied by the caller is not duplicated.
