[llvm] [CGData] llvm-cgdata (PR #89884)

[Kyungwoo Lee via llvm-commits]

kyulee-com wrote:

@ellishg Thanks for the reviews. Incorporated your suggestions.
Note this PR still contains the prior PR -- https://github.com/llvm/llvm-project/pull/89792 due to its dependency.

https://github.com/llvm/llvm-project/pull/89884