Backend: Introduce createUniformBuffer()

[sunag]

Related issue: #33373

Description

As before the idea as a whole should bring more clarity to the backend calls, including the management of removal in groups of shared and non-shared uniform buffers.

This also fixed other critical issues such as memory leaks and the recreation of shared uniform groups.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	365.3 86.77	365.3 86.77	+0 B +0 B
WebGPU	637.89 177.18	639.04 177.41	+1.15 kB +233 B
WebGPU Nodes	636.01 176.88	637.16 177.12	+1.15 kB +239 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	497.82 121.45	497.82 121.45	+0 B +0 B
WebGPU	709.67 192	710.82 192.25	+1.15 kB +250 B
WebGPU Nodes	658.89 179.29	660.04 179.56	+1.15 kB +270 B

[sunag]

The usage counter of Backend.deleteBindGroupData() should also be moved to the base class, likely Bindings. Ideally, calls to the Backend should be focused on execution, leaving caching to earlier classes.

[sunag]

@Mugen87 Just related, it’s still a WIP. I’ll ask for your review before merging so we can test it together 😇

[sunag]

Simple test - https://jsfiddle.net/ex0q4wb5/1/

Commands

Memory

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I'm leaving this #33413 (comment) for other PR.

The example webgpu_postprocessing_pixel seems broken on WebGLBackend but this not seems releated with this PR.
The BindGroup could be removed of cache in NodeBuilder but I think better leave it for other PR too.

[Mugen87]

The example webgpu_postprocessing_pixel seems broken on WebGLBackend but this not seems releated with this PR.

Indeed. It took me the entire morning but I have eventually found the bug. It was double confusing because the breakage does not appear in production (over https://threejs.org/) and sometimes not locally. More details in #33422.

[Mugen87]

I've tested some examples locally with the WebGPU and WebGL backend and everything looks good! 👍

[RenaudRohlinger]

Huge PR!! Amazing.