### Godot version

v4.1.dev.custom_build.a7276f1ce

### System information

Win10, AMD 2600, GeForce GTX 1060, Vulkan API 1.3.205

### Issue description

I can't get correct color data from an array of source_color type.
The color data is saved as **Color** in the file:
`shader_parameter/palette = [Color (1, 0, 0, 1), Color (0, 1, 0, 1), Color (0, 0, 1, 1)]`
Shouldn't it be saved as PackedColorArray?


### Steps to reproduce

1.Declare an array of source_color type.
2.Set colors.

### Minimal reproduction project

[shadertest.zip](https://github.com/godotengine/godot/files/11246504/shadertest.zip)

PackedStringArray warnings = Node::get_configuration_warnings();
	if (!active) {
		warnings.push_back(RTR("ShaderGlobalsOverride is not active because another node of the same type is in the scene."));
	}
	return warnings;
}
void ShaderGlobalsOverride::_bind_methods() {
	ClassDB::bind_method(D_METHOD("_activate"), &ShaderGlobalsOverride::_activate);
}
ShaderGlobalsOverride::ShaderGlobalsOverride() {}