### 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)

}
		if (p_just_one) {
			break;
		}
	}
	return OK;
}
String ShaderLanguage::_get_shader_type_list(const HashSet<String> &p_shader_types) const {
	
	String valid_types;
	for (const String &E : p_shader_types) {
		if (!valid_types.is_empty()) {
			valid_types += ", ";
		}
		valid_types += "'" + E + "'";
	}
	return valid_types;
}
String ShaderLanguage::_get_qualifier_str(ArgumentQualifier p_qualifier) const {
	switch (p_qualifier) {
		case ArgumentQualifier::ARGUMENT_QUALIFIER_IN:
			return "in";
		case ArgumentQualifier::ARGUMENT_QUALIFIER_OUT:
			return "out";
		case ArgumentQualifier::ARGUMENT_QUALIFIER_INOUT:
			return "inout";
	}
	return "";
}
Error ShaderLanguage::_validate_precision(DataType p_type, DataPrecision p_precision) {