[Clang] Correctly link and handle PGO options on the GPU (#185761) Summary: Currently, the GPU targets ignore the standard profiling arguments. This PR changes the behavior to use the standard handling, which links the in the now-present `libclang_rt.profile.a` if the user built with the compiler-rt support enabled. If it is not present this is a linker error and we can always suppress with `-Xarch_host` and `-Xarch_device`. Hopefully this doesn't cause some people pain if they're used to doing `-fprofile-generate` on a CPU unguarded since it was a stange mix of a no-op and not a no-op on the GPU until now.
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