DRILL-5352: Profile parser printing for multi fragments
Enhances the recently added ProfileParser to display run times for
queries that contain multiple fragments. (The original version handled
just a single fragment.)
Prints the query in “classic” mode if it is linear, or in the new
semi-indented mode if the query forms a tree.
Also cleans up formatting - removing spaces between parens.
Fixes from review
close apache/drill#782
* Fixed process time percent.
* Added support for getting operator profiles in a multi-fragment query.
