Update wgpu-native to the latest HEAD

[rdw-software]

Status: Waiting for upstream changes (upgrade to wgpu v25)

TODOs:

• Update wgpu-native extension structs
• Update wgpu-header structs
• Update test suite (should probably automate this?)
• Test that it works in a fully-fledged app (also need to automate this...)

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WIP:

typedef void (*WGPUProcBindGroupSetLabel)(WGPUBindGroup bindGroup, WGPUStringView label) WGPU_FUNCTION_ATTRIBUTE;

I think a better way to synchronize these bindings will be needed. They're changing the API too much, with no apparent plan. Either that or version lock/abstract everything (which may not be any less overhead/easier to maintain).