GLSLNodeBuilder: Check texture type when declaring usampler3D/sampler3D uniforms

[zonkypop]

Currently in the GLSLNodeBuilder, all Data3DTexture's are being declared as sampler3D. This PR adds the same checks which DataTexture have for their type, so usampler3D and isampler3D are now declared for their respective types

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	336.65 78.39	336.65 78.39	+0 B +0 B
WebGPU	522.53 145.06	522.57 145.08	+39 B +17 B
WebGPU Nodes	522 144.96	522.04 144.97	+39 B +17 B

🌳 Bundle size after tree-shaking

Minimal build including a renderer, camera, empty scene, and dependencies.

	Before	After	Diff
WebGL	465.7 112.26	465.7 112.26	+0 B +0 B
WebGPU	593 160.69	593.04 160.71	+39 B +15 B
WebGPU Nodes	548.13 150.12	548.16 150.14	+39 B +17 B