678: Require labels for ComputePass and RenderPass r=kvark a=infinitesnow Blocked on https://github.com/gfx-rs/wgpu/pull/1088/ https://github.com/gfx-rs/wgpu/pull/1088/ improved labelling, update `wgpu-rs` and examples to match. Change-Id: I1acc45a3023dfc78b6694bd4a28a0131f07b7ba7 Co-authored-by: Emanuele Dalla Longa <3xplosive.g@gmail.com>