[tint] Classify `texel_buffer` as a handle for test generation

Bug: 382544164
Change-Id: I786f5fc618d154377f092e5e9fe541bcaaeb3781
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/250895
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Diego Rodrigues <diejorarr@gmail.com>
diff --git a/test/tint/builtins/gen/gen.wgsl.tmpl b/test/tint/builtins/gen/gen.wgsl.tmpl
index 2293d0d..a4fc918 100644
--- a/test/tint/builtins/gen/gen.wgsl.tmpl
+++ b/test/tint/builtins/gen/gen.wgsl.tmpl
@@ -370,6 +370,7 @@
 {{-   else if HasPrefix $name "texture" -}}handle
 {{-   else if HasPrefix $name "sampler" -}}handle
 {{-   else if HasPrefix $name "input_attachment" -}}handle
+{{-   else if HasPrefix $name "texel_buffer" -}}handle
 {{-   else if        eq $name "ptr"     -}}{{(index .TemplateArguments 0).Target.Name}}
 {{-   else                              -}}function
 {{-   end -}}