Moved inference_engine samples to cpp folder (#8615)

* Moved inference_engine samples to cpp folder

* Fixed documentations links

* Fixed installation

* Fixed scripts

* Fixed cmake script

* Try to fix install

* Fixed samples

* Some fix

samples/cpp/speech_sample/CMakeLists.txt

@@ -0,0 +1,12 @@
+# Copyright (C) 2018-2021 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+#
+
+file (GLOB SRC ${CMAKE_CURRENT_SOURCE_DIR}/*.cpp
+file (GLOB HDR ${CMAKE_CURRENT_SOURCE_DIR}/*.hpp)
+               ${CMAKE_CURRENT_SOURCE_DIR}/*.h)
+
+ie_add_sample(NAME speech_sample
+              SOURCES ${SRC}
+              HEADERS ${HDR}
+              DEPENDENCIES cnpy ie_samples_utils)