WebGPURenderer: RenderBundle support transparent objects

[RenaudRohlinger]

Fixed #30681

Description

Support transparent objects with RenderBundle.

This contribution is funded by Utsubo

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	336.02 78.26	336.02 78.26	+0 B +0 B
WebGPU	523.86 145.45	523.98 145.48	+115 B +25 B
WebGPU Nodes	523.33 145.35	523.45 145.37	+115 B +24 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	465.06 112.14	465.06 112.14	+0 B +0 B
WebGPU	594.27 161.06	594.38 161.07	+115 B +20 B
WebGPU Nodes	549.39 150.49	549.51 150.51	+115 B +20 B

[sunag]

This was intentional for opaque materials to avoid sorting issues. I think we will need two separate bundles for opaque and transparent if we want to use transmission as well.