Add more enums to groups

[The-Minecraft-Scientist]

pretty self explanatory. This PR will probably expand to more additions in the future, so I'll keep it marked as a draft for now.

(edit) I'll try to avoid overlap with #431, so they can both eventually be merged independently Adds:

• GL_MAX_XYZ_ATOMIC_COUNTER_BUFFERS to GetPName
• GL_MAX_TRANSFORM_FEEDBACK_BUFFERS to GetPName
• GL_XYZ_BUFFER_BINDING to GetPName