[CIR] Handle DeclRefExpr's to NTTP Objects (#194482)
NTTP objects are represented as globals so that you can refer to
them/address of them/etc, but most access to them should result in
constant expressions. This patch implements the creation of these
globals, and allows compelation to continue.
This should fix up the last DeclRefExpr LValue that appears other than
MSGuids and named global registers, both of which are specific to
individual attributes.
