[WebGPU] Clean up renderer resources on scene change

[johnoyo]

Traceback (most recent call last):
File "C:\dev\pyGandalf\pyGandalf\examples\WebGPU\example02.py", line 273, in
main()
File "C:\dev\pyGandalf\pyGandalf\examples\WebGPU\example02.py", line 270, in main
Application().start()
File "c:\dev\pygandalf\pyGandalf\core\application.py", line 77, in start
cls.instance.window.dispatch_main_loop(main_loop)
File "c:\dev\pygandalf\pyGandalf\core\webgpu_window.py", line 60, in dispatch_main_loop
main_loop()
File "c:\dev\pygandalf\pyGandalf\core\application.py", line 66, in main_loop
SceneManager().on_update(cls.instance.delta_time)
File "c:\dev\pygandalf\pyGandalf\scene\scene_manager.py", line 42, in on_update
cls.instance.active_scene.on_update(ts)
File "c:\dev\pygandalf\pyGandalf\scene\scene.py", line 250, in on_update
system.on_update_base(ts)
File "c:\dev\pygandalf\pyGandalf\systems\system.py", line 116, in on_update_base
self.on_update_system(ts)
File "c:\dev\pygandalf\pyGandalf\systems\webgpu_rendering_system.py", line 112, in on_update_system
WebGPURenderer().end_render_pass()
File "c:\dev\pygandalf\pyGandalf\renderer\webgpu_renderer.py", line 248, in end_render_pass
cls.instance.current_render_pass.end()
File "C:\dev\pyGandalf\pyGandalf-venv\lib\site-packages\wgpu\backends\wgpu_native_api.py", line 2618, in end
libf.wgpuRenderPassEncoderEnd(self._internal)
File "C:\dev\pyGandalf\pyGandalf-venv\lib\site-packages\wgpu\backends\wgpu_native_helpers.py", line 314, in proxy_func
raise wgpu_error # the frame above is more interesting ↑↑
wgpu._classes.GPUValidationError: Validation Error

Caused by:
In wgpuRenderPassEncoderEnd
note: encoder = <CommandBuffer-(0, 1000, Vulkan)>
In a set_vertex_buffer command
note: buffer = <Buffer-(1611, 1, Vulkan)>
Vertex buffer index 16 is greater than the device's requested max_vertex_buffers limit 16