Revert "WebGPURenderer: use devices preferred canvas format (#28873)" (#28876)

This reverts commit 03ea6f2.

Author: Mugen87

src/renderers/webgpu/WebGPUBackend.js

@@ -2,7 +2,7 @@
 import 'https://greggman.github.io/webgpu-avoid-redundant-state-setting/webgpu-check-redundant-state-setting.js';
 //*/
 
-import { GPUFeatureName, GPULoadOp, GPUStoreOp, GPUIndexFormat, GPUTextureViewDimension } from './utils/WebGPUConstants.js';
+import { GPUFeatureName, GPUTextureFormat, GPULoadOp, GPUStoreOp, GPUIndexFormat, GPUTextureViewDimension } from './utils/WebGPUConstants.js';
 
 import WGSLNodeBuilder from './nodes/WGSLNodeBuilder.js';
 import Backend from '../common/Backend.js';
@@ -110,7 +110,7 @@ class WebGPUBackend extends Backend {
 
 		this.context.configure( {
 			device: this.device,
-			format: navigator.gpu.getPreferredCanvasFormat(),
+			format: GPUTextureFormat.BGRA8Unorm,
 			usage: GPUTextureUsage.RENDER_ATTACHMENT | GPUTextureUsage.COPY_SRC,
 			alphaMode: alphaMode
 		} );