[SYCL][E2E]Update Regression/multiple-targets.cpp

[PietroGhg]

Sets spir64 instead of spirv64 as SYCL target, uses lower case cuda and hip for REQUIRES flags, adds native_cpu as a possible required backend.

[PietroGhg]

Hi @intel/llvm-gatekeepers, I'm not sure what is causing the failure in the linux build job, do you have any idea what could be causing the error? I've tried restarting the job, pushing a merge commit and closing and re-opening the PR

[aelovikov-intel]

I renamed the cache directory and re-ran the task. It should re-create the cache now. Once that succeeds, I'll remove the renamed old cache directory completely.