Adding INT64 Tensor support

Adding INT64 Tensor support

include/aidge/backend/cpu/data/TensorImpl.hpp

@@ -101,7 +101,7 @@ class TensorImpl_cpu : public TensorImpl {
                 std::copy(static_cast<const uint16_t*>(src), static_cast<const uint16_t*>(src) + length,
                         static_cast<T *>(rawPtr()));
                 break;
-            case ataType::Int8:
+            case DataType::Int8:
                 std::copy(static_cast<const int8_t*>(src), static_cast<const int8_t*>(src) + length,
                         static_cast<T *>(rawPtr()));
                 break;