[SHT_LLVM_BB_ADDR_MAP] Avoids side-effects in addition since order is unspecified. (#79168)

Turns out the problem with
https://github.com/llvm/llvm-project/issues/60013 is due to the fact
that order of operation is unspecified in C++:
https://en.cppreference.com/w/cpp/language/eval_order. A small example
of where this manifests with MSVC can be seen here
https://ooo.godbolt.org/z/bxqKeqzqn.

This patch does the following:
* Removes the addition operations where we sequence more than one
side-effect based expression.
* Removes test guards to now run on Windows