[libcxx-commits] [libcxx] [libcxxabi] [libunwind] [NFC][libc++][libc++abi][libunwind][test] Fix/unify AIX triples used in LIT tests (PR #101196)

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llvmbot wrote:

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Failed to cherry-pick: [2d36550](https://github.com/llvm/llvm-project/commit/2d3655037ccfa276cb0949c2ce0cff56985f6637)

https://github.com/llvm/llvm-project/actions/runs/10200934511

Please manually backport the fix and push it to your github fork.  Once this is done, please create a [pull request](https://github.com/llvm/llvm-project/compare)

https://github.com/llvm/llvm-project/pull/101196