feat: Allow view layouts to infer launch info from buffer metadata

[wingertge]

Adds a new ViewLayoutLaunchArg trait that allows for a more specialized launch logic on views, inferring metadata from the buffer instead of passing everything explicitly. All LaunchArgs implement this trait automatically, and a new ConcreteLayout wrapper allows launching ViewLayoutLaunchArgs separately, with manually provided shapes/strides.

Moves FastDivmod initialization from the arg creation to registration, so it no longer needs the client and can instead use the device_properties on the scope to detect feature support.

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[louisfd]

LGTM