WebGPURenderer: Introduce Bind Groups

[sunag]

Related issue: #27134, #28347 (comment), #28665

Description

Continuation of the work started #27134 for shared bind group support between materials automatically.

The API follows the style defined here: #28347 (comment)

The bindings and groups sequences can be improved in complementary PRs through sorts at shader construction time.

• Renderer - Bind Groups
• WebGPUBackend
• WebGLBackend

[sunag]

@RenaudRohlinger @aardgoose The implementation is partially ready in WebGLBackend, I added instanceBindGroups=false in GLSLNodeBuilder for now. The groups are currently divided into vertex/fragments even though they are part of the same group, this has pros and cons. A future implementation could be to group them by means of a parameter.

[RenaudRohlinger]

@sunag This PR seems to have break the webgpu_storage_buffer example.