SWDEV-307185 - Move memory allocation under device layer

It can be too early to allocate memory at the begining of
Device::create() under PAL

Change-Id: I4bd76db7be3f6fb246243ea68022d8b0f860471d

rocclr/device/device.cpp

@@ -522,11 +522,6 @@ bool Device::create(const Isa &isa) {
   if (nullptr == vaCacheMap_) {
     return false;
   }
-  if (amd::IS_HIP) {
-    // Allocate initial heap for device memory allocator
-    static constexpr size_t HeapBufferSize = 1024 * Ki;
-    heap_buffer_ = createMemory(HeapBufferSize);
-  }
   return true;
 }