[llvm-branch-commits] [clang] [clang][PAC][ObjC] Merge the block metadata support for the arm64e abi to llvm 21 (PR #153725)

[Oliver Hunt via llvm-branch-commits]

ojhunt wrote:

> ping @AaronBallman for review
@tru 
I've reached out as well, but i believe the original cherrypick request was approved (https://github.com/llvm/llvm-project/pull/153725#pullrequestreview-3123667711) and this PR is just the manual merge of the required commits

https://github.com/llvm/llvm-project/pull/153725