[llvm] [mlir] [Offload] Add oneInterationPerThread param to loop device RTL (PR #151959)

[Michael Kruse via llvm-commits]

https://github.com/Meinersbur commented:

Could you add some documentation somewhere (e.g. as doxygen at the function defintion) one what the parameter means?

https://github.com/llvm/llvm-project/pull/151959