Refactor profiling output from profiling

Refactor profiling output from profiling

* Added a standard getFunctionStats() method for Profilers to return
  per function data as maps. This is not toolbar specific like getRawData().
* Cleaned up the interface of SectionProfiler::getFunctionStats() a bit.
* Removed unused cpu_sq, real_sq fields from profiler UDP output.
* Moved getTime/getInitialTime to ProfilerStandard.

Co-Authored-By: Aaron Schulz <aschulz@wikimedia.org>
Change-Id: I266ed82031a434465f64896eb327f3872fdf1db1