[Test] Add some TBDGen test cases for enum case witnesses
[Test] Add some TBDGen test cases for enum case witnesses

gregomni/swift,JGiola/swift,airspeedswift/swift,gregomni/swift,jckarter/swift,parkera/swift,jmgc/swift,hooman/swift,glessard/swift,tkremenek/swift,harlanhaskins/swift,ahoppen/swift,stephentyrone/swift,nathawes/swift,xwu/swift,jckarter/swift,JGiola/swift,rudkx/swift,xwu/swift,parkera/swift,jmgc/swift,jckarter/swift,roambotics/swift,ahoppen/swift,rudkx/swift,roambotics/swift,roambotics/swift,nathawes/swift,nathawes/swift,parkera/swift,CodaFi/swift,parkera/swift,roambotics/swift,roambotics/swift,airspeedswift/swift,tkremenek/swift,tkremenek/swift,atrick/swift,parkera/swift,allevato/swift,harlanhaskins/swift,harlanhaskins/swift,nathawes/swift,rudkx/swift,benlangmuir/swift,harlanhaskins/swift,airspeedswift/swift,xwu/swift,atrick/swift,harlanhaskins/swift,CodaFi/swift,rudkx/swift,allevato/swift,apple/swift,JGiola/swift,rudkx/swift,nathawes/swift,xwu/swift,apple/swift,atrick/swift,parkera/swift,gregomni/swift,xwu/swift,benlangmuir/swift,airspeedswift/swift,glessard/swift,benlangmuir/swift,glessard/swift,benlangmuir/swift,benlangmuir/swift,hooman/swift,jmgc/swift,airspeedswift/swift,apple/swift,allevato/swift,stephentyrone/swift,hooman/swift,CodaFi/swift,ahoppen/swift,jmgc/swift,ahoppen/swift,CodaFi/swift,parkera/swift,airspeedswift/swift,stephentyrone/swift,xwu/swift,ahoppen/swift,jmgc/swift,apple/swift,hooman/swift,CodaFi/swift,CodaFi/swift,jmgc/swift,harlanhaskins/swift,JGiola/swift,hooman/swift,gregomni/swift,JGiola/swift,allevato/swift,xwu/swift,stephentyrone/swift,jmgc/swift,gregomni/swift,hooman/swift,glessard/swift,atrick/swift,roambotics/swift,allevato/swift,tkremenek/swift,allevato/swift,ahoppen/swift,CodaFi/swift,apple/swift,stephentyrone/swift,gregomni/swift,harlanhaskins/swift,benlangmuir/swift,apple/swift,allevato/swift,stephentyrone/swift,tkremenek/swift,atrick/swift,parkera/swift,nathawes/swift,jckarter/swift,glessard/swift,airspeedswift/swift,jckarter/swift,tkremenek/swift,rudkx/swift,hooman/swift,jckarter/swift,JGiola/swift,stephentyrone/swift,tkremenek/swift,jckarter/swift,nathawes/swift,atrick/swift,glessard/swift