[benchmark] SetTest: Add tests for more operations and more cases
[benchmark] SetTest: Add tests for more operations and more cases

- Isolate legacy tests. Add new tests for the same operations, with updated iteration counts and names.
- Rename new tests to follow a consistent naming scheme.
- Add tests for Set.subtracting.
- Add tests on integer sets with 50% and 100% overlap. (isSubset, intersection, union, symmetricDifference, subtracting)

hooman/swift,shajrawi/swift,parkera/swift,xwu/swift,lorentey/swift,benlangmuir/swift,alblue/swift,natecook1000/swift,lorentey/swift,devincoughlin/swift,stephentyrone/swift,parkera/swift,parkera/swift,practicalswift/swift,jckarter/swift,lorentey/swift,danielmartin/swift,aschwaighofer/swift,aschwaighofer/swift,natecook1000/swift,shahmishal/swift,nathawes/swift,apple/swift,gribozavr/swift,ahoppen/swift,danielmartin/swift,roambotics/swift,danielmartin/swift,lorentey/swift,nathawes/swift,shahmishal/swift,gribozavr/swift,apple/swift,airspeedswift/swift,alblue/swift,glessard/swift,sschiau/swift,roambotics/swift,jmgc/swift,sschiau/swift,hooman/swift,airspeedswift/swift,karwa/swift,apple/swift,jckarter/swift,tkremenek/swift,xedin/swift,atrick/swift,rudkx/swift,gregomni/swift,jmgc/swift,devincoughlin/swift,karwa/swift,ahoppen/swift,jckarter/swift,stephentyrone/swift,nathawes/swift,shahmishal/swift,apple/swift,brentdax/swift,stephentyrone/swift,brentdax/swift,roambotics/swift,ahoppen/swift,austinzheng/swift,stephentyrone/swift,benlangmuir/swift,natecook1000/swift,atrick/swift,ahoppen/swift,tkremenek/swift,gregomni/swift,lorentey/swift,jmgc/swift,alblue/swift,tkremenek/swift,JGiola/swift,rudkx/swift,CodaFi/swift,amraboelela/swift,austinzheng/swift,gribozavr/swift,tkremenek/swift,practicalswift/swift,karwa/swift,shahmishal/swift,JGiola/swift,alblue/swift,benlangmuir/swift,atrick/swift,apple/swift,xwu/swift,brentdax/swift,karwa/swift,glessard/swift,ahoppen/swift,sschiau/swift,sschiau/swift,alblue/swift,harlanhaskins/swift,parkera/swift,apple/swift,tkremenek/swift,JGiola/swift,xedin/swift,natecook1000/swift,glessard/swift,glessard/swift,aschwaighofer/swift,shajrawi/swift,tkremenek/swift,austinzheng/swift,devincoughlin/swift,devincoughlin/swift,natecook1000/swift,gribozavr/swift,aschwaighofer/swift,sschiau/swift,jmgc/swift,airspeedswift/swift,xwu/swift,gribozavr/swift,alblue/swift,hooman/swift,stephentyrone/swift,shajrawi/swift,brentdax/swift,devincoughlin/swift,danielmartin/swift,xwu/swift,allevato/swift,benlangmuir/swift,parkera/swift,sschiau/swift,harlanhaskins/swift,shajrawi/swift,xedin/swift,xedin/swift,gribozavr/swift,harlanhaskins/swift,jckarter/swift,lorentey/swift,stephentyrone/swift,lorentey/swift,rudkx/swift,roambotics/swift,harlanhaskins/swift,parkera/swift,shahmishal/swift,JGiola/swift,shajrawi/swift,harlanhaskins/swift,amraboelela/swift,xedin/swift,shajrawi/swift,gregomni/swift,shajrawi/swift,amraboelela/swift,hooman/swift,roambotics/swift,practicalswift/swift,gregomni/swift,shahmishal/swift,xwu/swift,CodaFi/swift,shajrawi/swift,roambotics/swift,practicalswift/swift,rudkx/swift,xedin/swift,xedin/swift,hooman/swift,CodaFi/swift,allevato/swift,ahoppen/swift,CodaFi/swift,karwa/swift,practicalswift/swift,xedin/swift,danielmartin/swift,nathawes/swift,devincoughlin/swift,stephentyrone/swift,gribozavr/swift,devincoughlin/swift,amraboelela/swift,xwu/swift,austinzheng/swift,nathawes/swift,shahmishal/swift,hooman/swift,hooman/swift,lorentey/swift,xwu/swift,harlanhaskins/swift,jckarter/swift,sschiau/swift,jmgc/swift,CodaFi/swift,karwa/swift,jckarter/swift,allevato/swift,sschiau/swift,practicalswift/swift,parkera/swift,atrick/swift,austinzheng/swift,parkera/swift,practicalswift/swift,benlangmuir/swift,atrick/swift,brentdax/swift,danielmartin/swift,airspeedswift/swift,jmgc/swift,austinzheng/swift,tkremenek/swift,CodaFi/swift,gregomni/swift,karwa/swift,allevato/swift,glessard/swift,practicalswift/swift,natecook1000/swift,allevato/swift,alblue/swift,karwa/swift,nathawes/swift,brentdax/swift,JGiola/swift,harlanhaskins/swift,CodaFi/swift,airspeedswift/swift,rudkx/swift,jckarter/swift,amraboelela/swift,allevato/swift,aschwaighofer/swift,nathawes/swift,amraboelela/swift,atrick/swift,airspeedswift/swift,allevato/swift,devincoughlin/swift,rudkx/swift,glessard/swift,JGiola/swift,danielmartin/swift,jmgc/swift,gregomni/swift,benlangmuir/swift,aschwaighofer/swift,austinzheng/swift,natecook1000/swift,shahmishal/swift,amraboelela/swift,gribozavr/swift,brentdax/swift,airspeedswift/swift,aschwaighofer/swift