Rename BG[L]Binding to BG[L]Entry

This is to match the WebGPU API change.

The only manual changes are in dawn.json and templates. The rest was
created with the following commands:

  git grep -l BindGroupLayoutBinding | xargs sed -i "" -e "s/BindGroupLayoutBinding/BindGroupLayoutEntry/g"
  git grep -l BindGroupBinding | xargs sed -i "" -e "s/BindGroupBinding/BindGroupEntry/g"
  git cl format

Bug: dawn:22
Change-Id: I1377eef9ea9816578441c91d167909dedc7f8e96
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/18863
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

generator/templates/webgpu_cpp.h

@@ -216,6 +216,10 @@ namespace wgpu {
 
     {% endfor %}
 
+    // TODO(dawn:22): Remove this once users use the "Entry" version.
+    using BindGroupBinding = BindGroupEntry;
+    using BindGroupLayoutBinding = BindGroupLayoutEntry;
+
 }  // namespace wgpu
 
 #endif // WEBGPU_CPP_H_