Rename Render* to Gpu*

[kurtkuehnert]

Objective

Improve the consistency of the render module. See #7157 for more context

Solution

• This PR only focuses on renaming the type and variable names.

• renamed type names Render{Device, Queue, Adapter, AdapterInfo, Instance, Settings} to GPU{Device, Queue, Adapter, AdapterInfo, Instance, Settings}

• renamed variable names render_{device, queue, adapter, adapter_info, instance, context} to gpu_{device, queue, adapter, adapter_info, instance, context}

• maybe slightly controversial: I have additionally renamed a few occurrences of the variable name device and queue, which refer to a GPUDevice or GPUQueue, to gpu_device and gpu_queue for consistency's sake.

• many small changes and renames for consistency's sake

[github-actions]

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

Could you add some context on what users should update when this change get released in a new version of Bevy?
It will be used to help writing the migration guide for the version. Putting it after a ## Migration Guide will help it get automatically picked up by our tooling.

[alice-i-cecile]

Before we merge this, we should have a comprehensive migration guide ready :) I understand wanting to hold off until the bikeshedding is done though.

[rlidwka]

What is this change for? It replaced a clear filename with something entirely different.

[alice-i-cecile]

On that list, we should probably just close the rename Render to Gpu PR at this point. I was in favor of it, but it's been too long and too many things changed so whether we decided to do it or not it will need to a new PR

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