These are currently not used, but the first step towards moving type
constructors and converters over to using the intrinisc table.
This will simplify maintenance of type functions, and will greatly
simplify the [AbstractInt -> i32|u32] [AbstractFloat -> f32|f16] logic.
Bug: tint:1504
Change-Id: I15526670a6ff801e66551ab5adc37b1570ac49de
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/90242
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>