### 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)

material->uniform_dirty = material->uniform_dirty || p_uniform;
	material->texture_dirty = material->texture_dirty || p_texture;
	if (material->update_element.in_list()) {
		return;
	}
	material_update_list.add(&material->update_element);
}
void MaterialStorage::_update_queued_materials() {
	while (material_update_list.first()) {
		Material *material = material_update_list.first()->self();
		bool uniforms_changed = false;
		if (material->data) {
			uniforms_changed = material->data->update_parameters(material->params, material->uniform_dirty, material->texture_dirty);
		}
		material->texture_dirty = false;
		material->uniform_dirty = false;
		material_update_list.remove(&material->update_element);
		if (uniforms_changed) {
			
			material->dependency.changed_notify(Dependency::DEPENDENCY_CHANGED_MATERIAL);
		}
	}
}
RID MaterialStorage::material_allocate() {