Chrome 123 supports unrestricted_pointer_parameters extension in WGSL

[chrisdavidmills]

Summary

Chrome 123 supports the unrestricted_pointer_parameters language extension (see WGSLLanguageFeatures), which loosens restrictions on pointers being passed to WGSL functions as follows:

• Parameter pointers to storage, uniform, and workgroup address spaces being passed to user-declared functions.
• Pointers to structure members and array elements being passed to user-declared functions.

This PR adds a data point for the language extension.

See https://developer.chrome.com/blog/new-in-webgpu-123#unrestricted_pointer_parameters_in_wgsl for the data source.

Test results and supporting details

Spec PR: https://github.com/gpuweb/gpuweb/pull/4312

Related issues

Project issue: https://github.com/mdn/content/issues/36350

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This pull request has merge conflicts that must be resolved before it can be merged.