Making valid, invalid, and expired regular properties

[toji]

WIP. Removing the rather fuzzy definitions that we have for valid and invalid and replacing them with actual properties and algorithms that reference them.

Additionally, defines an explicit expired property for adapters rather than using it as an alias for valid since the new valid property exists on the GPUObjectBase, which adapters don't use.

TODO: A couple of algorithms are referencing the new valid/invalid algorithims from the content timeline, which shouldn't be allowed. Also, the definition for invalid is stupid. Finally, there's a couple of references to lost for devices which are aliases for valid. Feels like that should be normalized.

[github-actions]

Previews, as seen when this build job started (5658e07):
WebGPU _{webgpu.idl | Explainer | Correspondence Reference}
WGSL _{grammar.js | wgsl.lalr.txt}

[kainino0x]

Looking good so far!

[toji]

Thanks for the suggestions! Applied those, normalized all the invalid->lost instances I could find, refactored the Create*PipelineAsync algorithms to not violate timeline boundaries any more (still kinda handwavy with how what kind of error was produced is determined) and updated the valid/invalid algorithms to use the "flattened" syntax you suggested for expired because I liked that better.

Think it's ready for a proper review now.

[kainino0x]

Sorry, just realized I lost track of this one. I've put it back in my review inbox.