WebGPURenderer: Fix storage buffer binding update and 4 bytes alignment

[RenaudRohlinger]

Description

Currently, updating the value of a storage buffer does not reflect the changes in the compute program.

Additionally, if the storage buffer is of size 3, the 4-byte alignment applied during attribute initialization is not accounted for in the update method, resulting in corrupted values.

This contribution is funded by Utsubo

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	336.36 78.33	336.36 78.33	+0 B +0 B
WebGPU	518.03 143.8	518.34 143.87	+306 B +68 B
WebGPU Nodes	517.5 143.69	517.81 143.75	+306 B +67 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	465.35 112.17	465.35 112.17	+0 B +0 B
WebGPU	589.91 159.77	590.22 159.83	+306 B +66 B
WebGPU Nodes	545.27 149.23	545.58 149.3	+306 B +65 B