[clang] Revert "[clang][Driver] Support for the SPIR-V backend when compiling HIP (#167543)" (PR #169528)

[Juan Manuel Martinez Caamaño via cfe-commits]

jmmartinez wrote:

The failure in question: https://lab.llvm.org/buildbot/#/builders/11/builds/28746

https://github.com/llvm/llvm-project/pull/169528