[llvm-branch-commits] [lld] Backport "[ELF] Make shouldAddProvideSym return values consistent when demoted to Undefined" (PR #112136)

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DianQK wrote:

Now we also need to backport #112386. Would it be safer to revert ebb326a51fec37b5a47e5702e8ea157cd4f835cd in release/19.x?

https://github.com/llvm/llvm-project/pull/112136