[clang] [clang-tools-extra] `Clang`: `*noreturn` propagation in `CFG` (PR #146355)

[Mike Weller via cfe-commits]

https://github.com/MikeWeller commented:

Quick pass / haven't looked in-depth yet.

* I would mention in the description/summary that plain `noreturn` already has this behaviour (at least in one of the CFG.cpp vs. NoReturnFunctionChecker.cpp implementations) so this is adding the same behaviour for `analyzer_noreturn`.

https://github.com/llvm/llvm-project/pull/146355