The WGSL spec has been updated with 'Default Struct Layouts':
https://github.com/gpuweb/gpuweb/pull/1447
This removes the `[[offset(n)]]` decoration, and replaces it with two optional decorations: `[[size(n)]]` and `[[align(n)]]`, and a sensible set of sizes and alignments for each type.
Most `[[stride(n)]]` decorations have also been removed from arrays.
Bug: tint:626
Bug: tint:629
Change-Id: Ib0d2741f61ea943e6fb99d00cbb5cab2f97ae7be
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/44280
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>