Fix: Allow creating view with usage=0 from transient texture

[beicause]

Found in gfx-rs/wgpu#9568. webgpu:api,validation,createView:texture_view_usage_of_multiple_usages:usage1=16;usage2=32 fails when viewUsage is 0 because isValid is false, but this should be valid because viewUsage=0 means full set of usage.

I think the spec https://gpuweb.github.io/gpuweb/#texture-view-creation needs change, too

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• All missing test coverage is tracked with "TODO" or .unimplemented().
• New helpers are /** documented */ and new helper files are found in helper_index.txt.
• Test behaves as expected in a WebGPU implementation. (If not passing, explain above.)
• Test have be tested with compatibility mode validation enabled and behave as expected. (If not passing, explain above.)

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• Tests are properly located.
• Test descriptions are accurate and complete.
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• Tests avoid over-parameterization (see case count report).

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