[doc] Update SIL.rst to reflect debug_value_addr deprecation
[doc] Update SIL.rst to reflect debug_value_addr deprecation

And restructure the "Debug Information" section to make it flow better.

roambotics/swift,atrick/swift,benlangmuir/swift,xwu/swift,rudkx/swift,xwu/swift,benlangmuir/swift,glessard/swift,rudkx/swift,JGiola/swift,JGiola/swift,xwu/swift,atrick/swift,gregomni/swift,roambotics/swift,xwu/swift,atrick/swift,glessard/swift,roambotics/swift,glessard/swift,apple/swift,JGiola/swift,ahoppen/swift,ahoppen/swift,apple/swift,roambotics/swift,xwu/swift,atrick/swift,benlangmuir/swift,gregomni/swift,glessard/swift,apple/swift,atrick/swift,gregomni/swift,ahoppen/swift,apple/swift,JGiola/swift,rudkx/swift,atrick/swift,xwu/swift,gregomni/swift,benlangmuir/swift,ahoppen/swift,rudkx/swift,gregomni/swift,apple/swift,glessard/swift,roambotics/swift,rudkx/swift,roambotics/swift,ahoppen/swift,JGiola/swift,glessard/swift,JGiola/swift,apple/swift,ahoppen/swift,rudkx/swift,xwu/swift,benlangmuir/swift,benlangmuir/swift,gregomni/swift