Auto merge of #25637 - szeged:wgpu_crete_bind_group, r=jdm

Initial implementation of GPUBindGroup for WebGPU

Added WebIDL bindings for `GPUBindGroup`.
Implemented the `createBindGroup` function of `GPUDevice`
Renamed `GPUBindGroupBinding` to `GPUBindGroupBindings` and `GPUBufferBinding` to `GPUBufferBindings` in the WebIDL, because these names are already occupied.

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---
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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes addresses a part of #24706

cc @kvark @jdm @zakorgy

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components/script/dom/identityhub.rs

@@ -5,7 +5,7 @@
 use smallvec::SmallVec;
 use webgpu::wgpu::{
     hub::IdentityManager,
-    id::{AdapterId, BindGroupLayoutId, BufferId, DeviceId, PipelineLayoutId},
+    id::{AdapterId, BindGroupId, BindGroupLayoutId, BufferId, DeviceId, PipelineLayoutId},
     Backend,
 };
 
@@ -14,6 +14,7 @@ pub struct IdentityHub {
     adapters: IdentityManager,
     devices: IdentityManager,
     buffers: IdentityManager,
+    bind_groups: IdentityManager,
     bind_group_layouts: IdentityManager,
     pipeline_layouts: IdentityManager,
     backend: Backend,
@@ -25,6 +26,7 @@ impl IdentityHub {
             adapters: IdentityManager::default(),
             devices: IdentityManager::default(),
             buffers: IdentityManager::default(),
+            bind_groups: IdentityManager::default(),
             bind_group_layouts: IdentityManager::default(),
             pipeline_layouts: IdentityManager::default(),
             backend,
@@ -43,6 +45,10 @@ impl IdentityHub {
         self.buffers.alloc(self.backend)
     }
 
+    fn create_bind_group_id(&mut self) -> BindGroupId {
+        self.bind_groups.alloc(self.backend)
+    }
+
     fn create_bind_group_layout_id(&mut self) -> BindGroupLayoutId {
         self.bind_group_layouts.alloc(self.backend)
     }
@@ -126,6 +132,20 @@ impl Identities {
         self.select(backend).create_buffer_id()
     }
 
+    pub fn create_bind_group_id(&mut self, backend: Backend) -> BindGroupId {
+        match backend {
+            #[cfg(any(target_os = "linux", target_os = "windows"))]
+            Backend::Vulkan => self.vk_hub.create_bind_group_id(),
+            #[cfg(target_os = "windows")]
+            Backend::Dx12 => self.dx12_hub.create_bind_group_id(),
+            #[cfg(target_os = "windows")]
+            Backend::Dx11 => self.dx11_hub.create_bind_group_id(),
+            #[cfg(any(target_os = "ios", target_os = "macos"))]
+            Backend::Metal => self.metal_hub.create_bind_group_id(),
+            _ => self.dummy_hub.create_bind_group_id(),
+        }
+    }
+
     pub fn create_bind_group_layout_id(&mut self, backend: Backend) -> BindGroupLayoutId {
         self.select(backend).create_bind_group_layout_id()
     }