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
Use REQUIRED for the find_package that loads the hip config, because
it may fail, e.g. because dependent libraries are not found. Before
this if the find_package failed cmake silently continued.
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.
Currently, this feature is only supported on ELF platforms. So, the property
LINK_WHAT_YOU_USE will be ignored for other plateforms.
Moreover, flags and commands are now controled by CMake variables.
Fixes: #20174
