370: API update for RODS2 r=cwfitzgerald a=kvark
Reflects upstream changes in https://github.com/gfx-rs/wgpu/pull/716
I'm not too happy about the API just yet, has another idea that I'm going to discuss with the group on Monday, hopefully. But we need to get going and not block other wgpu-rs changes, so this should land in some way.
Co-authored-by: Dzmitry Malyshau <dmalyshau@mozilla.com>