[NFC] VarDecls in Pattern Binding Initializers Have No Overload Type
[NFC] VarDecls in Pattern Binding Initializers Have No Overload Type

Extend #27668 by declining to validate the type of variables
bound by a pattern binding initializer when computing an effective
overload type while rooted at that initializer.

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