Align the validation of Device::create_texture with the WebGPU spec

[nical]

Connections

The WebGPU specification for createTexture.

Description

This PR aligns the validation of create_texture with the steps described in the aforementioned specification. I tried to make sure the validation is at least as strict as the specification, but didn't attempt to remove any existing validation that isn't described in the specification.

There is a tiny bit of reordering so that the validation in the code goes in roughly the same order as the specification (for ease of comparison).

I also found in the process that the method is probably missing a view_formats parameter but if so, it will come in a followup.

Testing

None.

[nical]

Note I didn't quite get the difference between:

descriptor.[usage](https://www.w3.org/TR/webgpu/#dom-gputexturedescriptor-usage) must contain only bits present in this’s [allowed texture usages](https://www.w3.org/TR/webgpu/#allowed-texture-usages).

and

descriptor.[usage](https://www.w3.org/TR/webgpu/#dom-gputexturedescriptor-usage) must be a combination of [GPUTextureUsage](https://www.w3.org/TR/webgpu/#namespacedef-gputextureusage) values.

The latter I think is enforced by the type itself, but I'm not sure whether the former is provisioning for a future with more usages, some of which are not supported by all devices.

[cwfitzgerald]

This is great, thank you! Those two things feel redundant.