[build] don't embed bitcode for target libs built for simulators (#32871)
[build] don't embed bitcode for target libs built for simulators (#32871)

At the same time rework condition so that it is more amenable to code
searches.

Addresses rdar://65501878
allevato/swift,xwu/swift,apple/swift,ahoppen/swift,roambotics/swift,CodaFi/swift,airspeedswift/swift,CodaFi/swift,nathawes/swift,parkera/swift,airspeedswift/swift,CodaFi/swift,hooman/swift,hooman/swift,atrick/swift,jckarter/swift,allevato/swift,xwu/swift,glessard/swift,atrick/swift,allevato/swift,roambotics/swift,apple/swift,xwu/swift,nathawes/swift,jmgc/swift,CodaFi/swift,jckarter/swift,glessard/swift,rudkx/swift,apple/swift,jmgc/swift,JGiola/swift,jckarter/swift,gregomni/swift,tkremenek/swift,jmgc/swift,xwu/swift,CodaFi/swift,xwu/swift,JGiola/swift,jmgc/swift,rudkx/swift,gregomni/swift,atrick/swift,airspeedswift/swift,parkera/swift,JGiola/swift,JGiola/swift,hooman/swift,nathawes/swift,hooman/swift,nathawes/swift,rudkx/swift,benlangmuir/swift,glessard/swift,airspeedswift/swift,ahoppen/swift,ahoppen/swift,rudkx/swift,jckarter/swift,xwu/swift,allevato/swift,ahoppen/swift,apple/swift,benlangmuir/swift,jckarter/swift,allevato/swift,atrick/swift,CodaFi/swift,nathawes/swift,parkera/swift,hooman/swift,JGiola/swift,jckarter/swift,tkremenek/swift,CodaFi/swift,glessard/swift,gregomni/swift,parkera/swift,gregomni/swift,atrick/swift,jmgc/swift,tkremenek/swift,apple/swift,parkera/swift,nathawes/swift,jmgc/swift,parkera/swift,allevato/swift,roambotics/swift,tkremenek/swift,gregomni/swift,benlangmuir/swift,airspeedswift/swift,jmgc/swift,ahoppen/swift,roambotics/swift,benlangmuir/swift,glessard/swift,roambotics/swift,tkremenek/swift,rudkx/swift,atrick/swift,apple/swift,nathawes/swift,xwu/swift,benlangmuir/swift,glessard/swift,allevato/swift,gregomni/swift,parkera/swift,airspeedswift/swift,airspeedswift/swift,roambotics/swift,jckarter/swift,rudkx/swift,ahoppen/swift,tkremenek/swift,tkremenek/swift,parkera/swift,benlangmuir/swift,hooman/swift,hooman/swift,JGiola/swift