Follow-up from "Fix NotesController in EE failing since 16fe447d"

The following discussion from !9680 (merged) should be addressed:

• @godfat started a discussion:

  What do you think about we just override create_note_params? It can be:

  override :create_note_params
  def create_note_params
    parmas[:target_type] = 'Epic'
    parmas[:target_id] = epic.id
  
    super
  end

  This way we clearly set the dependency, knowing that whenever create_note_params changed, we need to be careful here.