[llvm] Avoid dbg.value between phi nodes when converting from DbgRecords (PR #83620)

[Daniel Sanders via llvm-commits]

dsandersllvm wrote:

It's working now without cherry-picking https://github.com/llvm/llvm-project/commit/2e39b57837aa1790b3ee078fa532bb1748a609c7 or the additional hack I needed last week. Upstream commits sometimes take a while to reach our fork as there's multiple forks between llvm.org and our project that they have to flow through first.

https://github.com/llvm/llvm-project/pull/83620