[llvm] [StrTable] Use string literal emission for intrinsics on non-MSVC platforms (PR #124856)

[Chandler Carruth via llvm-commits]

https://github.com/chandlerc commented:

You'll also need to update the Clang CMake to invoke `clang-tblgen` with this flag at least.

I'd very much like to wait until #120534 is merged before landing this because the string tables in LLVM itself, for an unknown reason, are not enough to trigger the miscompile for some of our MSVC users. We actually need the string tables in Clang as well. So until #120534 lands, you won't easily be able to tell if this PR regresses things. This is also why the failure to pass the flag in `clang-tblgen` likely has no effect (yet).

https://github.com/llvm/llvm-project/pull/124856