### 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)

return shader;
}
void ShaderMaterial::set_shader_parameter(const StringName &p_param, const Variant &p_value) {
	if (p_value.get_type() == Variant::NIL) {
		param_cache.erase(p_param);
		RS::get_singleton()->material_set_param(_get_material(), p_param, Variant());
	} else {
		Variant *v = param_cache.getptr(p_param);
		if (!v) {
			
			remap_cache["shader_parameter/" + p_param.operator String()] = p_param;
			param_cache.insert(p_param, p_value);
		} else {
			*v = p_value;
		}
		if (p_value.get_type() == Variant::OBJECT) {
			RID tex_rid = p_value;
			if (tex_rid == RID()) {
				param_cache.erase(p_param);
				RS::get_singleton()->material_set_param(_get_material(), p_param, Variant());
			} else {
				RS::get_singleton()->material_set_param(_get_material(), p_param, tex_rid);
			}
		} else {
			RS::get_singleton()->material_set_param(_get_material(), p_param, p_value);
		}
	}
}
Variant ShaderMaterial::get_shader_parameter(const StringName &p_param) const {