[ES] ES10 does not require initialization

It consists solely of DllImports that will be initialized on first use,
regardless of the existence of an OpenGL context.
[Win] Wgl no longer inherits GraphicsBindingsBase

This is a necessary step for the next commit.
[Bind][ES][GL] Output entry points as byte[]

Moving from string[] to byte[] reduces startup memory allocations
tremendously (up to 70% lower memory use on Windows!)