HIP: Fix search for hip-lang CMake package on multiarch distros

We need `CMAKE_LIBRARY_ARCHITECTURE` to find the package before HIP
compiler ABI detection.  However, if HIP is the first enabled language,
the value is not known until `CMAKE_HIP_LIBRARY_ARCHITECTURE` is
determined by the ABI detection step.  Resolve this by detecting
`CMAKE_HIP_LIBRARY_ARCHITECTURE` from the compiler id output.

Fixes: #24562