E2E: Add webgpu_compute_rasterizer_lighting to the exception list.

The TAA history feedback amplifies small backend precision differences,
so the accumulated result does not reproduce across GPUs.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

test/e2e/puppeteer.js

@@ -31,6 +31,9 @@ const exceptionList = [
 	'webgpu_tsl_vfx_linkedparticles',
 	'webgpu_volume_lighting_traa',
 
+	// Temporal accumulation diverges across GPUs
+	'webgpu_compute_rasterizer_lighting',
+
 	// Timming issues?
 	'physics_rapier_instancing',
 	'webgl_shadowmap',