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
It only makes sense to use the CMake package from the same ROCm
installation that the compiler uses. Ask the HIP compiler to report the
location of the ROCm installation. Verify up front that it contains the
expected CMake package file.
Brad King