WebGPURenderer: Ensure correct pixel storage parameters in WebGL Backend#29255

sunag merged 2 commits intomrdoob:devmrdoob/three.js:devfrom

RenaudRohlinger:utsubo/fix/texture-update-correct-pixelstoreiRenaudRohlinger/three.js:utsubo/fix/texture-update-correct-pixelstoreiCopy head branch name to clipboard