Add binned 2d/3d Wireframe render phase (#18587)

# Objective

Fixes #16896
Fixes #17737

## Solution

Adds a new render phase, including all the new cold specialization
patterns, for wireframes. There's a *lot* of regrettable duplication
here between 3d/2d.

## Testing

All the examples.

## Migration Guide
- `WireframePlugin` must now be created with
`WireframePlugin::default()`.

Author: tychedelia

crates/bevy_core_pipeline/src/core_2d/mod.rs

@@ -19,6 +19,7 @@ pub mod graph {
         MainOpaquePass,
         MainTransparentPass,
         EndMainPass,
+        Wireframe,
         Bloom,
         PostProcessing,
         Tonemapping,

crates/bevy_core_pipeline/src/core_3d/mod.rs

@@ -28,6 +28,7 @@ pub mod graph {
         MainTransmissivePass,
         MainTransparentPass,
         EndMainPass,
+        Wireframe,
         LateDownsampleDepth,
         Taa,
         MotionBlur,

crates/bevy_pbr/src/render/wireframe.wgsl

@@ -1,12 +1,12 @@
 #import bevy_pbr::forward_io::VertexOutput
 
-struct WireframeMaterial {
-    color: vec4<f32>,
-};
+struct PushConstants {
+    color: vec4<f32>
+}
+
+var<push_constant> push_constants: PushConstants;
 
-@group(2) @binding(0)
-var<uniform> material: WireframeMaterial;
 @fragment
 fn fragment(in: VertexOutput) -> @location(0) vec4<f32> {
-    return material.color;
+    return push_constants.color;
 }