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

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DianQK wrote:

Mark as draft due to https://github.com/llvm/llvm-project/pull/111945#issuecomment-2412354753.

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