Implement Drill-specific rule for first level server-side sort

Phoenix should have a physical operator that executes a sort on the server-side which Drill can leverage when re-ordering is necessary. Unlike PHOENIX-2269 which is clearing going to be more efficient to let Phoenix handle, the sort is more of a gray area. Phoenix will be faster in the way it does the scan within the coprocessor, but it still needs to return the same number of rows. This process puts a pretty heavy burden on the region server as well. We should measure performance with and without Phoenix doing the sort. One potential scenario that may be a win for Phoenix is if the rows are already partially sorted and Phoenix can take advantage of this (which is not currently the case).