Moved matrix_normal uniform declaration to more appropriate chunk (playcanvas#7746)

Co-authored-by: Martin Valigursky <mvaligursky@snapchat.com>

Author: mvaligursky

examples/src/examples/shaders/trees.example.mjs

@@ -145,7 +145,6 @@ assetListLoader.load(() => {
         attribute vec4 vertex_position;
         uniform mat4 matrix_viewProjection;
         uniform mat4 matrix_model;
-        uniform mat3 matrix_normal;
 
         #if defined(INSTANCING)
             #include "transformInstancingVS"

src/scene/shader-lib/glsl/chunks/common/vert/normalCore.js

@@ -2,6 +2,8 @@ export default /* glsl */`
 
 attribute vec3 vertex_normal;
 
+uniform mat3 matrix_normal;
+
 #ifdef MORPHING_NORMAL
     #ifdef MORPHING_INT
         uniform highp usampler2D morphNormalTex;

src/scene/shader-lib/glsl/chunks/common/vert/transformCore.js

@@ -4,7 +4,6 @@ attribute vec4 vertex_position;
 
 uniform mat4 matrix_viewProjection;
 uniform mat4 matrix_model;
-uniform mat3 matrix_normal;
 
 #ifdef MORPHING
     uniform vec2 morph_tex_params;

src/scene/shader-lib/wgsl/chunks/common/vert/normalCore.js

@@ -2,6 +2,8 @@ export default /* wgsl */`
 
 attribute vertex_normal: vec3f;
 
+uniform matrix_normal: mat3x3f;
+
 #ifdef MORPHING_NORMAL
     #ifdef MORPHING_INT
         var morphNormalTex: texture_2d<u32>;

src/scene/shader-lib/wgsl/chunks/common/vert/transformCore.js

@@ -4,8 +4,7 @@ export default /* wgsl */`
 
     uniform matrix_viewProjection: mat4x4f;
     uniform matrix_model: mat4x4f;
-    uniform matrix_normal: mat3x3f;
-
+    
     #ifdef MORPHING
 
         uniform morph_tex_params: vec2f;