[gardening] Re-organize Cleanup.cpp so that methods on the same class are together and not interleaved.
[gardening] Re-organize Cleanup.cpp so that methods on the same class are together and not interleaved.

This code was organized such that one had first definitions for CleanupManager,
then CleanupStateRestorationScope, and then again CleanupManager. This is just
confusing/hard to read. This commit fixes that by creating contiguous sections
of definitions with comment flags to document said sections.

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