Phosphor bronze or 80/20 bronze strings clack more cause they could amplify themselves more than other kinds of strings on an unplugged ABG. Of course, you can change them with stainless steel or any other kinds of strings, but you would lose the unplugged volume. This wouldn't be a matter if you use your ABG plugged-in to an amplifier more.
But... I don't think stainless steel strings are less clacky. I've never used them on ABG, but I've been using them on my electric bass since the 80s. In my ears, they clack more, although compared with nickel (plated steel) strings.
I've actually gigged with my ABG (strung with 80/20 bronze strings) in numerous times. What I do to tame down the clacks (more so cause it's plugged-in to an amplifier) is that I would turn down the treble on the ABG's built-in preamp. They are still bright enough with the treble all the way down, but the clacks are way less pronounced.