refactor: remove vr support

[jdrueckert]

Contains

Removes classes and code related to VR Support as part of the scope reduction for the 2023 revival efforts.

Removed classes:

• OpenVRInput
• OpenVRControllers
• OpenVRStereoCamera
• OpenVRProvider
• OpenVRState
• OpenVRUtils
• ControllerListener

Adjustments (removed code paths and usages) in:

• Terasology.java
• StateInGame
• WorldRendererImpl
• LocalPlayerSystem
• FirstPersonHeldItemMountPointComponent
• RenderingConfig
• Video Settings Menu
• ModuleTestingEnvironment
• IntegrationEnvironment

How to test

Brief description of how to test / confirm this PR before merging

• Compile Terasology, verify that no build errors
• Start Terasology and CoreGameplay, verify that starts properly
• Check Video Settings Menu looks fine

Outstanding before merging

• Discuss whether and potentially decide that we indeed want to remove VR support

Dependencies

Requires Terasology/CoreRendering#74 and Terasology/ModuleTestingEnvironment#77

[pollend]

vulkan has a KHR extension for multi-view. not sure if wgpu implement this but something we can explore much much later. just wanted to note this.

https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VK_KHR_multiview.html

[DarkWeird]

vulkan has a KHR extension for multi-view. not sure if wgpu implement this but something we can explore much much later. just wanted to note this.

https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VK_KHR_multiview.html

@pollend
Just for note:
https://github.com/philpax/wgpu-openxr-example

Example for openxr (vr) + wgpu.
This example interesting in another way too - there exposes underlaying api of wgpu - you can take vulkan directly.

Wgpu have open issue about vr. Maybe.. it will closed when we returns to VR.

[skaldarnar]

Tests out fine!