[SYCL][e2e] Config/allowlist.cpp fails on ARL integrated gpu

### Describe the bug

When testing on arch-intel_gpu_mtl_u

https://github.com/intel/llvm/actions/runs/20233797399/job/58084916394?pr=20890
```
# executed command: env TEST_PLATFORM_AVAILABLE=1 env SYCL_UR_TRACE=1 env SYCL_CONFIG_FILE_NAME=/__w/llvm/llvm/build-e2e/Config/Output/allowlist.cpp.tmp2.conf /__w/llvm/llvm/build-e2e/Config/Output/allowlist.cpp.tmp.out
# .---command stderr------------
# | terminate called after throwing an instance of 'std::runtime_error'
# | what(): Expected only one platform.
# `-----------------------------
# error: command failed with exit status: -6

```

### To reproduce

### Environment

### Additional context

_No response_