[llvm] [MSan] Update type for MsanMetadataPtrForLoadN and MsanMetadataPtrForStoreN (PR #135040)

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

@k-kashapov This looks redundant. Probably settings of your local checkout need to be updated.

![image](https://github.com/user-attachments/assets/9707b23b-4f20-407e-a17f-bd3a4d3b7ea6)


https://github.com/llvm/llvm-project/pull/135040