655: Update to gfx from master r=kvark a=kvark
Depends on https://github.com/gfx-rs/wgpu/pull/1057
Expect the unexpected wrt the gpu-descriptor, which hasn't been tested much!
Also refactors the CI a bit to reduce the number of jobs by moving out `wasm` into a separate job.
Co-authored-by: Dzmitry Malyshau <kvarkus@gmail.com>