WebGPURenderer: Video fix wrong colorSpace in WebGL Backend

[RenaudRohlinger]

Related issue: #26516 #29213

Description

Use sRGB decode until browsers properly support SRGB8_ALPHA8 with video textures (#26516)

This contribution is funded by Utsubo

[RenaudRohlinger]

This PR along with #29255 fixes some issues on the official examples, should we include these in r168 or r169? /cc @mrdoob @Mugen87 @sunag

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Filesize dev	Filesize PR	Diff
WebGLRenderer	685.4 kB (169.7 kB)	685.4 kB (169.7 kB)	+0 B
WebGPURenderer	818.5 kB (221.2 kB)	818.6 kB (221.2 kB)	+79 B

🌳 Bundle size after tree-shaking

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

	Filesize dev	Filesize PR	Diff
WebGLRenderer	462 kB (111.4 kB)	462 kB (111.4 kB)	+0 B
WebGPURenderer	564.7 kB (153.3 kB)	564.8 kB (153.4 kB)	+78 B

[mrdoob]

This PR along with #29255 fixes some issues on the official examples, should we include these in r168 or r169? /cc @mrdoob @Mugen87 @sunag

They can go in r168. I'll do the release tomorrow (in ~12 hours).