[swift-syntax-test] Make VerifySyntaxTree a command line option (#15227)
[swift-syntax-test] Make VerifySyntaxTree a command line option (#15227)

Add `-verify-syntax-tree` option to `swift-syntax-test`.
Defaulted to `true`, can be disabled with `-verify-syntax-tree=false`
devincoughlin/swift,atrick/swift,harlanhaskins/swift,shajrawi/swift,hooman/swift,roambotics/swift,jckarter/swift,jopamer/swift,jmgc/swift,austinzheng/swift,gregomni/swift,jopamer/swift,xedin/swift,glessard/swift,jmgc/swift,shahmishal/swift,hooman/swift,benlangmuir/swift,karwa/swift,hooman/swift,glessard/swift,xedin/swift,shahmishal/swift,karwa/swift,rudkx/swift,JGiola/swift,brentdax/swift,aschwaighofer/swift,parkera/swift,rudkx/swift,amraboelela/swift,airspeedswift/swift,benlangmuir/swift,tkremenek/swift,apple/swift,aschwaighofer/swift,airspeedswift/swift,natecook1000/swift,parkera/swift,huonw/swift,huonw/swift,danielmartin/swift,allevato/swift,jopamer/swift,CodaFi/swift,jopamer/swift,atrick/swift,harlanhaskins/swift,gribozavr/swift,gribozavr/swift,lorentey/swift,parkera/swift,alblue/swift,alblue/swift,xedin/swift,hooman/swift,gribozavr/swift,xwu/swift,karwa/swift,natecook1000/swift,danielmartin/swift,tjw/swift,ahoppen/swift,xedin/swift,natecook1000/swift,devincoughlin/swift,natecook1000/swift,lorentey/swift,ahoppen/swift,allevato/swift,CodaFi/swift,xwu/swift,CodaFi/swift,ahoppen/swift,shajrawi/swift,brentdax/swift,amraboelela/swift,shajrawi/swift,danielmartin/swift,CodaFi/swift,jckarter/swift,parkera/swift,parkera/swift,glessard/swift,lorentey/swift,amraboelela/swift,apple/swift,tkremenek/swift,shajrawi/swift,shahmishal/swift,parkera/swift,gregomni/swift,jckarter/swift,xedin/swift,austinzheng/swift,jopamer/swift,benlangmuir/swift,sschiau/swift,apple/swift,ahoppen/swift,ahoppen/swift,practicalswift/swift,natecook1000/swift,huonw/swift,tkremenek/swift,xwu/swift,austinzheng/swift,practicalswift/swift,tkremenek/swift,airspeedswift/swift,harlanhaskins/swift,lorentey/swift,karwa/swift,jckarter/swift,lorentey/swift,brentdax/swift,roambotics/swift,allevato/swift,JGiola/swift,devincoughlin/swift,stephentyrone/swift,tkremenek/swift,shajrawi/swift,xwu/swift,aschwaighofer/swift,xwu/swift,aschwaighofer/swift,natecook1000/swift,roambotics/swift,amraboelela/swift,sschiau/swift,jmgc/swift,gribozavr/swift,nathawes/swift,karwa/swift,jckarter/swift,harlanhaskins/swift,CodaFi/swift,lorentey/swift,huonw/swift,shahmishal/swift,huonw/swift,tjw/swift,lorentey/swift,shahmishal/swift,rudkx/swift,roambotics/swift,sschiau/swift,tkremenek/swift,amraboelela/swift,atrick/swift,aschwaighofer/swift,stephentyrone/swift,devincoughlin/swift,xedin/swift,rudkx/swift,nathawes/swift,gregomni/swift,xwu/swift,austinzheng/swift,alblue/swift,roambotics/swift,JGiola/swift,roambotics/swift,stephentyrone/swift,stephentyrone/swift,glessard/swift,austinzheng/swift,glessard/swift,hooman/swift,harlanhaskins/swift,devincoughlin/swift,shahmishal/swift,practicalswift/swift,atrick/swift,parkera/swift,sschiau/swift,airspeedswift/swift,rudkx/swift,atrick/swift,alblue/swift,xedin/swift,shahmishal/swift,brentdax/swift,jmgc/swift,tkremenek/swift,karwa/swift,amraboelela/swift,stephentyrone/swift,ahoppen/swift,JGiola/swift,rudkx/swift,practicalswift/swift,tjw/swift,alblue/swift,benlangmuir/swift,jckarter/swift,devincoughlin/swift,lorentey/swift,practicalswift/swift,devincoughlin/swift,atrick/swift,apple/swift,karwa/swift,allevato/swift,jmgc/swift,gregomni/swift,tjw/swift,brentdax/swift,airspeedswift/swift,brentdax/swift,jmgc/swift,CodaFi/swift,sschiau/swift,xedin/swift,sschiau/swift,shajrawi/swift,gribozavr/swift,alblue/swift,allevato/swift,gregomni/swift,practicalswift/swift,benlangmuir/swift,nathawes/swift,jopamer/swift,tjw/swift,karwa/swift,apple/swift,aschwaighofer/swift,nathawes/swift,austinzheng/swift,gribozavr/swift,aschwaighofer/swift,danielmartin/swift,practicalswift/swift,gribozavr/swift,harlanhaskins/swift,allevato/swift,alblue/swift,stephentyrone/swift,jopamer/swift,apple/swift,danielmartin/swift,brentdax/swift,tjw/swift,JGiola/swift,allevato/swift,tjw/swift,sschiau/swift,xwu/swift,jmgc/swift,huonw/swift,glessard/swift,amraboelela/swift,CodaFi/swift,nathawes/swift,gribozavr/swift,shahmishal/swift,stephentyrone/swift,JGiola/swift,danielmartin/swift,hooman/swift,airspeedswift/swift,practicalswift/swift,airspeedswift/swift,shajrawi/swift,huonw/swift,danielmartin/swift,nathawes/swift,gregomni/swift,jckarter/swift,natecook1000/swift,benlangmuir/swift,shajrawi/swift,hooman/swift,nathawes/swift,parkera/swift,harlanhaskins/swift,sschiau/swift,devincoughlin/swift,austinzheng/swift