Benchmarker improvements + more benchmarks

[rctcwyvrn]

Taking the stuff not waiting for legal approval from #515 and adding some more stuff

Benchmarker improvements

• Fixing some benchmark names
• Add suite filtering by patterns instead of names
• Exclude firstMatch benchmarks by default because they were running too quickly and not providing information the matches benchmarks weren't
• Add flag for excluding the NSRegex comparison benchmarks
• Make save and compare take file paths like a normal CLI instead of the weirdness it was doing before
• Add some basic statistics to the runner (standard deviation computation, t-test to determine notable improvements/regressions)
• Add a benchmark type for running a whole match regex on each item in a list of strings

New benchmarks

• Emojis
• Dice notation
• Swiftc error messages
• ipv4, ipv6, Mac addresses

(If you saw the bit I had here about the interesting list benchmark results, ignore it. It was just a bug :C)

[rctcwyvrn]

@swift-ci test

[milseman]

LGTM!

[milseman]

@swift-ci please test

[rxwei]

Should this print the error instead of trapping the program?

[rctcwyvrn]

Being too variant generally indicates that the system is running stuff in the background and making the benchmarker variant, so in those cases I thought it would probably best to just stop everything and make the user restart it