Include date in the Metrics for period console output

[ash211]

Currently artillery has a console output for completed runs that looks like this:

--------------------------------
Summary report @ 16:49:52(-0800)
--------------------------------

This is helpful for copy+pasting results to a notebook tracking results, but even more helpful would be to have the date included there and not just timestamp. For testing over multiple days, seeing the date in console output would help users keep track of when a run completed, not just its time.

I think the change would be around here:

artillery/packages/artillery/lib/console-reporter.js

Line 157 in 6af4f1f

const txt = `Summary report @ ${formatTimestamp(new Date())}`;