Static Device Global Doesn't Work for HIP

### Describe the bug

We want [this test](https://github.com/intel/llvm/blob/sycl/sycl/test-e2e/DeviceGlobal/device_global_static.cpp) to work on `hip_amd` but it doesn't, as the HIP TC seems to "disappear" static `device_global` symbols. Perhaps we need to change the linkage of the symbol as an easy fix.

https://github.com/intel/llvm/pull/15224#issuecomment-2334143522

### To reproduce

Run [this test](https://github.com/intel/llvm/blob/sycl/sycl/test-e2e/DeviceGlobal/device_global_static.cpp)

### Environment

- OS: [e.g Windows/Linux]
- Target device and vendor: AMD GPU
- DPC++ version: 74fa7ba37259bdaf3a29a8813a901a486e99f10c

### Additional context

_No response_