I need to route the Gigabit Ethernet CAT6 cable on the outside wall. The cable is certified for outdoor use, but I'm puzzled how to attach it to stucco. Would I need to drill stucco with masonry bit and use something like that: https://www.amazon.com/Aluminum-Cable-Clips-Stucco-Surfaces/dp/B009XGON8W or there is a way to do it without drilling? Can it be glued to stucco?
The stucco clips linked in the question should be OK, as long as they are big enough that they don't damage the cable.
Flex Clips are popular with the cable companies
you drill and use a plastic anchor with these
It is going to sag a bit between anchors, but the closer you space them, the less it will sag.
Gluing it would be a mess - I would not recommend that.