Use Ruby Tempfile when writing files extracted from inside OpenStudio CLI

[asparke2]

There is an issue where writing a .stat file to a temporary location doesn't work in all circumstances because the save location is relative to Dir.pwd, which is dependent on where the Ruby process is started from. Instead, use Ruby's built-in Tempfile to write the .stat file, read it, then close the Tempfile (which deletes it).

[asparke2]

@DavidGoldwasser @tijcolem @mdahlhausen FYI so we don't lose this

[mdahlhausen]

The weather module refactor moved this file around. The Dir.pwd is now here.
@asparke2 thoughts on just writing it to the weather data directory as part of standards? I'm not sure temp file will work for the .epw file, since E+ needs it for the simulation.