### 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 material_owner.allocate_rid();
}
void MaterialStorage::material_initialize(RID p_rid) {
	material_owner.initialize_rid(p_rid);
	Material *material = material_owner.get_or_null(p_rid);
	material->self = p_rid;
}
void MaterialStorage::material_free(RID p_rid) {
	Material *material = material_owner.get_or_null(p_rid);
	ERR_FAIL_COND(!material);
	
	
	for (KeyValue<StringName, Variant> &E : material->params) {
		if (E.value.get_type() == Variant::ARRAY) {
			Array(E.value).clear();
		}
	}
	material_set_shader(p_rid, RID()); 
	material->dependency.deleted_notify(p_rid);
	material_owner.free(p_rid);
}
void MaterialStorage::material_set_shader(RID p_material, RID p_shader) {