Its a grinding application, not a cutting application. You ever oil up your angle grinder?

These are all wrong. The purpose of the water is to keep the bit and glass from heating up. When you heat glass locally, its expands and causes tension across the cooler areas. This tension causes it to crack. Drills/saw blades are generally diamond. You're not going to lubricate diamond. Its all about keep all the glass the same temperature.

I was a glassblower for years. I've sawn/cut/drilled many a glass.