[AST] CustomAttrNominalRequest should look into protocol members as well
[AST] CustomAttrNominalRequest should look into protocol members as well

When performing unqualified lookup via directReferencesForUnqualifiedTypeLookup(), we should look into protocol members as well, as it's possible that the user has defined a typealias

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