Fix deferred lighting pass values not all working on M1 in WebGL2 (#1…

…0304)

# Objective

- On MacOS M1 WebGL2 the deferred lighting ID depth comparison is
failing for some values (including 1, the default)
Note: this issue is just with WebGL2, native on MacOS M1 is working with
current bevy main.

## Solution

- Use Depth16Unorm for lighting pass id format.

This format is aliasing to the same value consistently (in
[copy_deferred_lighting_id](https://github.com/bevyengine/bevy/blob/main/crates/bevy_core_pipeline/src/deferred/copy_deferred_lighting_id.wgsl#L15)
and
[deferred_lighting](https://github.com/bevyengine/bevy/blob/main/crates/bevy_pbr/src/deferred/deferred_lighting.wgsl#L39))
on MacOS M1 WebGL, and appears to be supported across WebGL2, WebGPU,
DX12, OpenGL 3.3, Vulkan.

Successfully tested all 256 ids on:

- MacOS M1 native and WebGL2
- Window RTX3060 Vulkan/DX12/WebGL2
- Windows Intel UHD Graphics 630 IGP DX12/WebGL2 
(bevy w/ Vulkan doesn't work on this IGP in general
#8037)

crates/bevy_core_pipeline/src/deferred/mod.rs

@@ -12,7 +12,7 @@ use bevy_utils::{nonmax::NonMaxU32, FloatOrd};
 
 pub const DEFERRED_PREPASS_FORMAT: TextureFormat = TextureFormat::Rgba32Uint;
 pub const DEFERRED_LIGHTING_PASS_ID_FORMAT: TextureFormat = TextureFormat::R8Uint;
-pub const DEFERRED_LIGHTING_PASS_ID_DEPTH_FORMAT: TextureFormat = TextureFormat::Depth32Float;
+pub const DEFERRED_LIGHTING_PASS_ID_DEPTH_FORMAT: TextureFormat = TextureFormat::Depth16Unorm;
 
 /// Opaque phase of the 3D Deferred pass.
 ///