[clang] [llvm] [mlir] [NVPTX] Convert vector function nvvm.annotations to attributes (PR #127736)

[Han-Chung Wang via cfe-commits]

hanhanW wrote:

Thanks for the heads-up! We do have few cases like:

```cpp
          setMetadataValueI32("maxntidx", workgroupSize[0]);
          setMetadataValueI32("maxntidy", workgroupSize[1]);
          setMetadataValueI32("maxntidz", workgroupSize[2]);

https://github.com/llvm/llvm-project/pull/127736