[clang] [lld] [llvm] Reapply "Deprecate the `-fbasic-block-sections=labels` option." (PR #110039)

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steelannelida wrote:

This broke on of our tests. Here's a repro: https://godbolt.org/z/5xc7GfxcY

I'm not sure if that's intentional or a bug.

https://github.com/llvm/llvm-project/pull/110039