PowerPC Build Improvements for ClickHouse

Multiple preparations for PowerPC builds: Enable the bundled openldap on ppc64le. #22487 (Kfir Itzhak). Enable compiling on ppc64le with Clang. #22476 (Kfir Itzhak). Fix compiling boost on ppc64le. #22474 (Kfir Itzhak). Fix CMake error about internal CMake variable CMAKE_ASM_COMPILE_OBJECT not set on ppc64le. #22469 (Kfir Itzhak). Fix Fedora/RHEL/CentOS not finding libclang_rt.builtins on ppc64le. #22458 (Kfir Itzhak). Enable building with jemalloc on ppc64le. #22447 (Kfir Itzhak). Fix ClickHouse's config embedding and cctz's timezone embedding on ppc64le. #22445 (Kfir Itzhak). Fixed compiling on ppc64le and use the correct instruction pointer register on ppc64le. #22430 (Kfir Itzhak).