Prefer to create an OpenGL 3.2 (forward-compatible) context by default

[jellysquid3]

This pull request makes it so the early display no longer attempts to "upgrade" the OpenGL context to the latest available version. A config option (disabled by default) is added which allows this behavior to be enabled again in case we introduce breakages, but the goal should be to eventually remove it.

Since the default behavior is changed to only request an OpenGL 3.2 Core context, mods which previously looked at the context version will now need to instead query the available extensions using GLCapabilities in LWJGL.

Note that this is a potentially breaking change. However, of the mods found so far that even request a higher context version, all but one of them has been verified as not needing the context upgrade in the first place. We can submit patches to these mods if necessary to have them look at the GLCapabilities instead.

Motivations:

• Some OpenGL behavior is known to change (notably integer normalization) if a different context version is requested explicitly. When an OpenGL 3.2 (forward-compatible) context is used, this behavior is consistent regardless of what capabilities the hardware supports.
• Even though such hardware is becoming rare, attempting to create an OpenGL context multiple times can take a very long time on older hardware, especially when NeoForge needs to fail downwards from GL 4.6 all the way to GL 3.2.
• Some graphics drivers on Windows (older AMD Radeon HD) will fail to correctly handle a context re-initialization and instead crash out.
• There is also third-party software on Windows which is known to try and replace the OpenGL context by hooking WGL, and cannot survive context re-initialization.

[neoforged-pr-publishing]

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