tint/ast: Generate ast::TexelFormat from intrinsics.def

Emit unit tests for parsing and printing.
Emit benchmarks for parsing.
Uses intrinsics.def as a single-source-of-truth.
The generators provide a way to optimize the enum parsers.

Change-Id: I603c2a1bd238eb8d059f3d13238e5e48379de6af
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/97202
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>

src/tint/inspector/resource_binding.cc

@@ -104,7 +104,7 @@ ResourceBinding::TexelFormat TypeTexelFormatToResourceBindingTexelFormat(
             return ResourceBinding::TexelFormat::kRgba32Sint;
         case ast::TexelFormat::kRgba32Float:
             return ResourceBinding::TexelFormat::kRgba32Float;
-        case ast::TexelFormat::kNone:
+        case ast::TexelFormat::kInvalid:
             return ResourceBinding::TexelFormat::kNone;
     }
     return ResourceBinding::TexelFormat::kNone;