IVGCVSW-4487 Remove boost::filesystem

 * Replace filesystem::path
 * Replace filesystem::exists
 * Replace filesystem::is_directory
 * Replace filesystem::directory_iterator
 * Replace filesystem::filesystem_error exception
 * Replace filesystem::temp_directory_path
 * Replace filesystem::unique path
 * Replace filesystem::ofstream with std::ofstream
 * Replace filesystem::remove
 * Replace filesystem::is_regular_file
 * Replace boost::optional with armnn::Optional in touched files
 * Remove some superfluous includes
 * Update build guides, GlobalConfig.cmake and CMakeLists.txt
 * Remove redundant armnnUtils::Filesystem::Remove function.
 * Remove redundant armnnUtils::Filesystem::GetFileSize function.

Temporarily adding back Boost::filesystem to enable Boost::dll.

Signed-off-by: Francis Murtagh <francis.murtagh@arm.com>
Signed-off-by: Colm Donelan <Colm.Donelan@arm.com>

Change-Id: Ifa46d4a0097d2612ddacd8e9736c0b36e365fb11
diff --git a/src/armnnQuantizer/QuantizationDataSet.cpp b/src/armnnQuantizer/QuantizationDataSet.cpp
index 7042d74..819b437 100644
--- a/src/armnnQuantizer/QuantizationDataSet.cpp
+++ b/src/armnnQuantizer/QuantizationDataSet.cpp
@@ -6,12 +6,8 @@
 #include "QuantizationDataSet.hpp"
 #include "CsvReader.hpp"
 
-#define BOOST_FILESYSTEM_NO_DEPRECATED
-
 #include <armnn/utility/IgnoreUnused.hpp>
-
-#include <boost/filesystem/operations.hpp>
-#include <boost/filesystem/path.hpp>
+#include <Filesystem.hpp>
 
 namespace armnnQuantizer
 {
@@ -105,7 +101,7 @@
 {
     std::string fileName = csvRows[rowIndex].values[2];
 
-    if (!boost::filesystem::exists(fileName))
+    if (!fs::exists(fileName))
     {
         throw armnn::ParseException("File [ " + fileName + "] provided on CSV row " + std::to_string(rowIndex) +
                                     " does not exist.");