This is a working naga 28 update. I noticed some tests haven't passed
(specifically cargo test --all-features) since before 0.14, so this PR
doesn't attempt to make them pass.

## enumerate_adaptors

`instance.enumerate_adapters` is async now (and available on webgpu):
gfx-rs/wgpu#8230 . more details in the wgpu
release notes.

## ControlBarrier & MemoryBarrier

Barrier was split in two to support MemoryBarriers:
gfx-rs/wgpu#7630

From the PR, it seems like falling back to ControlBarrier is fine so
that's what I did.

## Ray Query enable

ray queries require `enable wgpu_ray_query;`:
gfx-rs/wgpu#8545

This doesn't currently seem to make it through, and the relevant test
fails.

## ImageAtomic

Image atomics were added in gfx-rs/wgpu#6706

## Mesh Shaders

Mesh shaders are a major feature of wgpu 28, ~~but I've set their fields
to None here in the interest of doing an upgrade and not a feature add
at the same time~~

https://github.com/gfx-rs/wgpu/releases/tag/v28.0.0

update: I found some time and built a wgpu mesh/task shader demo and
used that to validate some of the mesh shader functionality. I've used
this to successfully compile a task shader with naga-oil and run it, but
there's still something missing from the mesh shader module output here.

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Co-authored-by: robtfm <50659922+robtfm@users.noreply.github.com>