[clang] [Clang] Fix isWeakImported() to traverse redeclaration chain for avai… (PR #181482)

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kevinlzh1108 wrote:

Hi @vsapsai , sorry for the disturbance.I'm new to LLVM, is there anything else needed before this can be merged? Does it need additional approvals?

https://github.com/llvm/llvm-project/pull/181482