tint: Allow signed / unsigned texture builtin params

Bug: tint:1526
Change-Id: I301a9ba6e94b162a1ffb436be3e3212b723b7401
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/106682
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
diff --git a/test/tint/builtins/gen/var/textureStore/602b5a.wgsl.expected.wgsl b/test/tint/builtins/gen/var/textureStore/602b5a.wgsl.expected.wgsl
new file mode 100644
index 0000000..ca22b44
--- /dev/null
+++ b/test/tint/builtins/gen/var/textureStore/602b5a.wgsl.expected.wgsl
@@ -0,0 +1,23 @@
+@group(1) @binding(0) var arg_0 : texture_storage_1d<rg32float, write>;
+
+fn textureStore_602b5a() {
+  var arg_1 = 1u;
+  var arg_2 = vec4<f32>();
+  textureStore(arg_0, arg_1, arg_2);
+}
+
+@vertex
+fn vertex_main() -> @builtin(position) vec4<f32> {
+  textureStore_602b5a();
+  return vec4<f32>();
+}
+
+@fragment
+fn fragment_main() {
+  textureStore_602b5a();
+}
+
+@compute @workgroup_size(1)
+fn compute_main() {
+  textureStore_602b5a();
+}