Integrate LLVM at llvm/llvm-project@54cb552b9620
Integrate LLVM at llvm/llvm-project@54cb552b9620

Updates LLVM usage to match
[54cb552b9620](https://github.com/llvm/llvm-project/commit/54cb552b9620)

PiperOrigin-RevId: 325829818
Change-Id: If43fd8a2f7453600e07781bcf288b09d1cd8ffc1

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