In noticed this in wgpu repo: gfx-rs/wgpu#8930 (comment) where reporting more memory to JS engine will help trigger GC sooner and maybe thats the solution we need for OOM in webgpu CTS. But we should also use this for other stuff (canvases and such).

Relevant SM functions are here: https://searchfox.org/firefox-main/source/js/public/MemoryFunctions.h#78

BTW gecko also reports this for every dom object: https://searchfox.org/firefox-main/source/dom/bindings/BindingUtils.h#2930 and maybe we should too.