[Checkout] Update checkout scheme for release/5.3
[Checkout] Update checkout scheme for release/5.3

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