TSL: Fix normalView normalize() applied at vertex stage

[sunag]

Related issue: Closes #29272

Description

Fixed difference between normalView of WebGLRenderer and WebGPURenderer.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	685.4 kB 169.7 kB	685.4 kB 169.7 kB	+0 B +0 B
WebGPU	819.2 kB 221.5 kB	819.3 kB 221.5 kB	+24 B +0 B
WebGPU Nodes	818.8 kB 221.4 kB	818.8 kB 221.4 kB	+443 B +103 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	462 kB 111.4 kB	462 kB 111.4 kB	+0 B +0 B
WebGPU	565.4 kB 153.5 kB	565.4 kB 153.5 kB	+24 B +0 B
WebGPU Nodes	524.7 kB 143.9 kB	524.7 kB 143.9 kB	-40.64 kB +1 B