[OpenMP] Add memory allocation using hwloc (#132843)

This patch adds support for memory allocation using hwloc. To enable
memory allocation using hwloc, env KMP_TOPOLOGY_METHOD=hwloc needs to be
used. If hwloc is not supported/available, allocation will fallback to
default path.

Author: nawrinsu

openmp/runtime/src/kmp.h

@@ -1107,6 +1107,7 @@ extern omp_allocator_handle_t __kmp_def_allocator;
 #endif
 
 extern int __kmp_memkind_available;
+extern bool __kmp_hwloc_available;
 
 typedef omp_memspace_handle_t kmp_memspace_t; // placeholder
 
@@ -1119,6 +1120,9 @@ typedef struct kmp_allocator_t {
   kmp_uint64 pool_size;
   kmp_uint64 pool_used;
   bool pinned;
+#if KMP_USE_HWLOC
+  omp_alloctrait_value_t membind;
+#endif
 } kmp_allocator_t;
 
 extern omp_allocator_handle_t __kmpc_init_allocator(int gtid,

openmp/runtime/src/kmp_affinity.cpp

@@ -1444,6 +1444,7 @@ void KMPAffinity::pick_api() {
   if (__kmp_affinity_top_method == affinity_top_method_hwloc &&
       __kmp_affinity.type != affinity_disabled) {
     affinity_dispatch = new KMPHwlocAffinity();
+    __kmp_hwloc_available = true;
   } else
 #endif
   {