[MIN][DSGN] encapsulating raw pointer access into an helper function in order...

[MIN][DSGN] encapsulating raw pointer access into an helper function in order to make it easier to change implementation related to aidge_core#21 (closed) and related to aidge_core!41 (closed) which will get easier to keep up to date.

include/aidge/backend/cpu/data/GetCPUPtr.h

+/********************************************************************************
+ * Copyright (c) 2023 CEA-List
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ ********************************************************************************/
+
+#ifndef AIDGE_CPU_DATA_GETCPUPTR_H_
+#define AIDGE_CPU_DATA_GETCPUPTR_H_
+
+#include "aidge/data/Tensor.hpp"
+
+namespace Aidge {
+inline void *getCPUPtr(std::shared_ptr<Aidge::Data> const &data) {
+  return std::static_pointer_cast<Tensor>(data)->getImpl()->rawPtr();
+}
+} // namespace Aidge
+
+#endif // AIDGE_CPU_DATA_GETCPUPTR_H_
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