Port to 2.1 - Don't check for libintl.h on OSX (#20118)

Author: janvorli

src/pal/src/configure.cmake

@@ -37,7 +37,10 @@ check_include_files(sys/prctl.h HAVE_PRCTL_H)
 check_include_files(numa.h HAVE_NUMA_H)
 check_include_files(pthread_np.h HAVE_PTHREAD_NP_H)
 check_include_files("sys/auxv.h;asm/hwcap.h" HAVE_AUXV_HWCAP_H)
-check_include_files("libintl.h" HAVE_LIBINTL_H)
+
+if(NOT CMAKE_SYSTEM_NAME STREQUAL Darwin)
+  check_include_files("libintl.h" HAVE_LIBINTL_H)
+endif()
 
 if(NOT CMAKE_SYSTEM_NAME STREQUAL FreeBSD AND NOT CMAKE_SYSTEM_NAME STREQUAL NetBSD)
   set(CMAKE_REQUIRED_FLAGS "-ldl")