Ensure we adhere to storypackage source ordering

Many aeons ago we decided that curated story packages (trailblocks) should be sorted by publication date and not the source order that comes out of the content api. 

Our current thinking is that this decision was wrong and we should in fact adhere to the authors intended ordering.

This PR removes the ordering for story packages but maintains it for related content queries.

/cc @gklopper @ironsidevsquincy @rich-nguyen