[llvm] [offload] add context to olMemAlloc* (PR #222677)

[Jan Trusiłło via llvm-commits]

311Volt wrote:

[llvm-gpu-loader.cpp](https://github.com/llvm/llvm-project/blob/main/llvm/tools/llvm-gpu-loader/llvm-gpu-loader.cpp) is out-of-date

https://github.com/llvm/llvm-project/pull/222677