Replace the Jackson Serialization Mixin logic to suppress certain properties from HippoBean objects to be serialized

To avoid self referencing issues and recursion in Jackson Serialization, the Page Model API uses Jackson Serialization Mixins to suppress certain properties or classes to be serialized

However, it is quite brittle (adding a getAncestor method in HippoBean is likely to now break serialization in content feed or page model api) and complex. This should be improved to make less brittle and less complex