refactor(render): move WgpuWrapper into bevy_utils

[atlv24]

Objective

• A step towards splitting out bevy_camera from bevy_render

Solution

• Move a shim type into bevy_utils to avoid a dependency cycle
• Manually expand Deref/DerefMut to avoid having a bevy_derive dependency so early in the dep tree

Testing

• It compiles

[bushrat011899]

Minor changes for no_std compatibility (in case someone activates the atomics feature on wasm32v1-none for example). Otherwise, I think this is a good idea.

[bushrat011899]

Just need to update line 24 of bevy_utils/Cargo.toml:

- std = ["alloc", "bevy_platform/std", "dep:thread_local"]
+ std = ["alloc", "bevy_platform/std", "dep:thread_local", "dep:send_wrapper"]

[github-actions]

It looks like your PR is a breaking change, but you didn't provide a migration guide.

Please review the instructions for writing migration guides, then expand or revise the content in the migration guides directory to reflect your changes.

[atlv24]

I don't believe this needs a migration guide, WgpuWrapper wasn't exposed before.

[bushrat011899]

My mistake! I saw that it was pub and assumed so.

[bushrat011899]

Perfect!

[alice-i-cecile]

@atlv24 merge conflicts, sorry!