Add support for OpenGL ES 3.2

[Khhs167]

I genuinely think it wouldn't hurt to support OpenGL ES 3.2.

It's been supported on Android since 2016, it's used in game engines like Godot, it actually has an up-to-date API similar to that of OpenGL 3.x(roughly) and should not be overlooked. We also have maintained bindings of OpenGL ES 2 and 1, so I don't see why not.

I know about #443, and I chose to overlook it.

Sorry for the (possible) mess btw...

[NogginBops]

Can we clarify what you are asking for.
If you are looking for the GL ES 3.2 entry points they (should) exist in the bindings (in the OpenTK.Graphics.ES30 namespace).
Or are you asking for opengl es context creation support?

[NogginBops]

Also it would be good to mention what version of OpenTK you want this for. 3, 4, or 5?

[Khhs167]

I noticed that this might be something missing from Silk.NET instead of OpenTK 😅

But if something happens to be missing, I'd guess it should be 5? 5 is the next major version, and adding more API support feels like a major addition.

[NogginBops]

OpenTK 5 used the latest khronos spec for OpenGL and OpenGL ES. It should contain all entry points that exist in OpenGL.

The most likely case is that OpenTK 4 is missing some of the OpenGL ES 3.1 and 3.2 entry points as pointed out by @BoyBaykiller in the discord.
I'll look into updating the OpenTK 4 bindings for OpenTK 4.9.0.