WebGPURenderer: Reaaply align of frontFace and fix FrontFacingNode

[sunag]

Fixes: #31764
Related issue: #31769

Description

@mrdoob told me just now that the release will be published on monday, if it passes the @WestLangley tests, I would go back and merge it into this release if you agree.

I just reapplied the @Mugen87 PR and fixed the FrontFacingNode.

Example
https://jsfiddle.net/vjgan6xh/1/

import { frontFacing, color, select } from 'three/tsl';

// short code simple to test
tubeBottom.material.colorNode = select( frontFacing, color( 0xff0000 ), color( 0x00ff00 ) );
tubeTop.material.colorNode = select( frontFacing, color( 0x0000ff ), color( 0x00ff00 ) );

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	338.91 79.11	338.91 79.11	+0 B +0 B
WebGPU	579.35 159.66	579.25 159.66	-106 B +6 B
WebGPU Nodes	577.96 159.41	577.85 159.42	-106 B +7 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	470.78 113.9	470.78 113.9	+0 B +0 B
WebGPU	649.5 175.53	649.4 175.53	-106 B +7 B
WebGPU Nodes	603.6 164.67	603.49 164.68	-106 B +10 B

[Mugen87]

@sunag If @WestLangley does not respond in time, I would suggest to merge the PR for 180 since it's an improvement over the status quo. Both backends now consistently respond to the scene setup. And the logic is in line with WebGLRenderer.