Description: Add @NotNullAnyField annotation
How it works: If all fields of the class are null - the class is not valid
Use case: We have DTO class for update entity. The class may contain all fields of entity, but the field update only happens if it is not null. Also, if all fields of DTO are null, there should be a validation error. @NotNullAnyField annotation will allow us to validate DTO without without long `if`