[ConstraintSystem] Move score kind for `Fix` before `Unavailable`
[ConstraintSystem] Move score kind for `Fix` before `Unavailable`

Any solution which doesn't require source changes should be considered
better than any other solution which does.

Otherwise solutions with fixes are always considered better than
solutions with unavailable overloads, which isn't correct especially
considering that different types of errors are now diagnosed via
forming solutions with fixes.

gregomni/swift,austinzheng/swift,jopamer/swift,nathawes/swift,airspeedswift/swift,xedin/swift,tkremenek/swift,danielmartin/swift,gregomni/swift,airspeedswift/swift,hooman/swift,harlanhaskins/swift,xwu/swift,austinzheng/swift,practicalswift/swift,tkremenek/swift,benlangmuir/swift,alblue/swift,hooman/swift,natecook1000/swift,devincoughlin/swift,xedin/swift,karwa/swift,xedin/swift,airspeedswift/swift,harlanhaskins/swift,gregomni/swift,sschiau/swift,alblue/swift,allevato/swift,brentdax/swift,tkremenek/swift,atrick/swift,devincoughlin/swift,brentdax/swift,amraboelela/swift,alblue/swift,jmgc/swift,apple/swift,xedin/swift,apple/swift,alblue/swift,aschwaighofer/swift,brentdax/swift,JGiola/swift,parkera/swift,jmgc/swift,xwu/swift,atrick/swift,jopamer/swift,shajrawi/swift,parkera/swift,shajrawi/swift,lorentey/swift,amraboelela/swift,amraboelela/swift,stephentyrone/swift,airspeedswift/swift,natecook1000/swift,glessard/swift,tkremenek/swift,harlanhaskins/swift,benlangmuir/swift,natecook1000/swift,alblue/swift,allevato/swift,hooman/swift,lorentey/swift,stephentyrone/swift,rudkx/swift,shahmishal/swift,gribozavr/swift,danielmartin/swift,jmgc/swift,shahmishal/swift,aschwaighofer/swift,sschiau/swift,hooman/swift,karwa/swift,rudkx/swift,devincoughlin/swift,gribozavr/swift,ahoppen/swift,glessard/swift,parkera/swift,allevato/swift,nathawes/swift,karwa/swift,karwa/swift,sschiau/swift,gribozavr/swift,gribozavr/swift,aschwaighofer/swift,glessard/swift,brentdax/swift,alblue/swift,lorentey/swift,roambotics/swift,amraboelela/swift,jopamer/swift,parkera/swift,amraboelela/swift,stephentyrone/swift,CodaFi/swift,apple/swift,jckarter/swift,devincoughlin/swift,practicalswift/swift,lorentey/swift,danielmartin/swift,benlangmuir/swift,jmgc/swift,stephentyrone/swift,nathawes/swift,parkera/swift,practicalswift/swift,tkremenek/swift,brentdax/swift,jmgc/swift,xwu/swift,karwa/swift,gribozavr/swift,austinzheng/swift,harlanhaskins/swift,CodaFi/swift,hooman/swift,apple/swift,JGiola/swift,aschwaighofer/swift,jopamer/swift,glessard/swift,karwa/swift,airspeedswift/swift,apple/swift,gregomni/swift,hooman/swift,amraboelela/swift,jckarter/swift,brentdax/swift,jckarter/swift,glessard/swift,atrick/swift,sschiau/swift,gregomni/swift,natecook1000/swift,hooman/swift,atrick/swift,sschiau/swift,shahmishal/swift,parkera/swift,sschiau/swift,natecook1000/swift,benlangmuir/swift,CodaFi/swift,xedin/swift,shajrawi/swift,shajrawi/swift,shajrawi/swift,rudkx/swift,alblue/swift,lorentey/swift,glessard/swift,aschwaighofer/swift,CodaFi/swift,stephentyrone/swift,sschiau/swift,natecook1000/swift,shajrawi/swift,xwu/swift,xedin/swift,jopamer/swift,lorentey/swift,rudkx/swift,apple/swift,austinzheng/swift,practicalswift/swift,ahoppen/swift,shahmishal/swift,gregomni/swift,CodaFi/swift,CodaFi/swift,roambotics/swift,austinzheng/swift,xedin/swift,shahmishal/swift,gribozavr/swift,gribozavr/swift,allevato/swift,devincoughlin/swift,shajrawi/swift,jopamer/swift,jckarter/swift,gribozavr/swift,JGiola/swift,sschiau/swift,CodaFi/swift,danielmartin/swift,karwa/swift,stephentyrone/swift,jmgc/swift,austinzheng/swift,xwu/swift,nathawes/swift,lorentey/swift,airspeedswift/swift,tkremenek/swift,xedin/swift,shahmishal/swift,allevato/swift,nathawes/swift,practicalswift/swift,atrick/swift,danielmartin/swift,rudkx/swift,practicalswift/swift,shajrawi/swift,shahmishal/swift,karwa/swift,natecook1000/swift,ahoppen/swift,ahoppen/swift,jckarter/swift,benlangmuir/swift,roambotics/swift,JGiola/swift,rudkx/swift,jckarter/swift,ahoppen/swift,parkera/swift,airspeedswift/swift,roambotics/swift,danielmartin/swift,harlanhaskins/swift,allevato/swift,JGiola/swift,JGiola/swift,devincoughlin/swift,practicalswift/swift,harlanhaskins/swift,aschwaighofer/swift,roambotics/swift,austinzheng/swift,aschwaighofer/swift,amraboelela/swift,stephentyrone/swift,nathawes/swift,nathawes/swift,ahoppen/swift,devincoughlin/swift,danielmartin/swift,jckarter/swift,devincoughlin/swift,xwu/swift,practicalswift/swift,parkera/swift,roambotics/swift,tkremenek/swift,jmgc/swift,harlanhaskins/swift,benlangmuir/swift,jopamer/swift,allevato/swift,brentdax/swift,shahmishal/swift,lorentey/swift,atrick/swift,xwu/swift