### Godot version

4.0.beta16

### System information

Windows 10 Pro x64, GLES3, RTX 3080 Ti (528.02)

### Issue description

In Compatibility/GLES3 back-end, shaders which use a uniform to get the normal roughness buffer cannot compile. For example, the shader:
```glsl
shader_type spatial;

uniform sampler2D normal_roughness_texture : hint_normal_roughness_texture;

void fragment() {
    vec4 sample = texture(normal_roughness_texture, UV);
}
```
results in an error in the output:
```
  drivers/gles3/shader_gles3.cpp:242 - SceneShaderGLES3: Fragment shader compilation failed:
  0(890) : error C1503: undefined variable "normal_roughness_buffer"
  
  drivers/gles3/shader_gles3.cpp:342 - Method/function failed.
```

If I switch over to the Mobile or Forward+ backends, there is no shader compilation error.

### Steps to reproduce

Open the attached reproduction in the 4.0.beta16 editor.

When the scene is opened, the error is produced automatically:
1. Open `scene.tscn`
2. Open Output to review error

When the scene is saved with any changes made to the shader, the same error is also produced:
1. Open `scene.tscn`
2. Open `example.gdshader` in the shader editor.
3. Make a compile-able change to the shader.
4. Save the scene
5. Open Output to review the error

### Minimal reproduction project

[NormalRoughnessTexture_GLES3_Error.zip](https://github.com/godotengine/godot/files/10534253/NormalRoughnessTexture_GLES3_Error.zip)

return false;
		}
		FunctionNode *pfunc = shader->functions[i].function;
		if (arg_list.is_empty()) {
			for (int j = 0; j < pfunc->arguments.size(); j++) {
				if (j > 0) {
					arg_list += ", ";
				}
				String func_arg_name;
				if (pfunc->arguments[j].type == TYPE_STRUCT) {
					func_arg_name = pfunc->arguments[j].type_str;
				} else {
					func_arg_name = get_datatype_name(pfunc->arguments[j].type);
				}
				if (pfunc->arguments[j].array_size > 0) {
					func_arg_name += "[";
					func_arg_name += itos(pfunc->arguments[j].array_size);
					func_arg_name += "]";
				}
				arg_list += func_arg_name;
			}
		}
		if (pfunc->arguments.size() != args.size()) {
			last_arg_count = pfunc->arguments.size();
			continue;
		}
		bool fail = false;
		for (int j = 0; j < args.size(); j++) {
			if (get_scalar_type(args[j]) == args[j] && p_func->arguments[j + 1]->type == Node::TYPE_CONSTANT && args3[j] == 0 && convert_constant(static_cast<ConstantNode *>(p_func->arguments[j + 1]), pfunc->arguments[j].type)) {