WebGPURenderer: Fix depth/stencil format out-of-sync bug.

[Mugen87]

Fixed #32706.

Description

Render pass encoder and pipeline must use the same attachment state when rendering which is currently not true when a render pass disables depth but has a depth texture instance assigned to its render target. The PR makes sure encoder and pipeline handle this use case in a common way which means depth must be enabled so a depth texture can be used.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	355.41 84.51	355.41 84.51	+0 B +0 B
WebGPU	621.22 172.51	621.21 172.51	-13 B -4 B
WebGPU Nodes	619.83 172.28	619.82 172.27	-13 B -4 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	487.36 119.29	487.36 119.29	+0 B +0 B
WebGPU	691.88 187.8	691.86 187.79	-13 B -4 B
WebGPU Nodes	641.68 174.96	641.66 174.96	-13 B -4 B