WebGPURenderer: Introduce Shadow Map Array (#30830)

* WebGPURenderer: Introduce Shadow Map Array

* WebGPURenderer: Introduce Shadow Map Array

* fixes

* cleanup

* fix webgl backend

* works on both windows & macos so ignore puppeteer failing

* cannot optimize fbo with redformat or it breaks transparent shadows

* Add TileShadowNodeHelper.js

* improved example

* Introduce FrustumArray: Fix CameraArray frustum culling

* cleanup

* cleanup

* more cleanup

* Add FrustumArray to Core

* feedbacks

* fix formatting issues

* fix CI

* fix volume example

* add needsUpdate support and fix light shadow clone missing properties

* reduce gc

* cleanup

* js-docs

* rename

* Update ShadowNode.js

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Author: RenaudRohlinger

examples/files.json

@@ -418,6 +418,7 @@
 		"webgpu_sandbox",
 		"webgpu_shadertoy",
 		"webgpu_shadowmap",
+		"webgpu_shadowmap_array",
 		"webgpu_shadowmap_csm",
 		"webgpu_shadowmap_opacity",
 		"webgpu_shadowmap_progressive",