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/tests/ImageCSVFileGenerator/ImageCSVFileGenerator.cpp b/tests/ImageCSVFileGenerator/ImageCSVFileGenerator.cpp
index 706a0c0..0d2252d 100644
--- a/tests/ImageCSVFileGenerator/ImageCSVFileGenerator.cpp
+++ b/tests/ImageCSVFileGenerator/ImageCSVFileGenerator.cpp
@@ -3,9 +3,7 @@
 // SPDX-License-Identifier: MIT
 //
 
-#include <boost/filesystem.hpp>
-#include <boost/filesystem/operations.hpp>
-#include <boost/filesystem/path.hpp>
+#include <Filesystem.hpp>
 #include <boost/program_options.hpp>
 
 #include <algorithm>
@@ -35,13 +33,13 @@
             dir += "/";
         }
 
-        if (!boost::filesystem::exists(dir))
+        if (!fs::exists(dir))
         {
             std::cerr << "Directory [" << dir << "] does not exist" << std::endl;
             return false;
         }
 
-        if (!boost::filesystem::is_directory(dir))
+        if (!fs::is_directory(dir))
         {
             std::cerr << "Given directory [" << dir << "] is not a directory" << std::endl;
             return false;
@@ -58,20 +56,20 @@
             return false;
         }
 
-        if (boost::filesystem::exists(outputFileName))
+        if (fs::exists(outputFileName))
         {
             std::cerr << "Output file [" << outputFileName << "] already exists" << std::endl;
             return false;
         }
 
-        if (boost::filesystem::is_directory(outputFileName))
+        if (fs::is_directory(outputFileName))
         {
             std::cerr << "Output file [" << outputFileName << "] is a directory" << std::endl;
             return false;
         }
 
-        boost::filesystem::path outputPath(outputFileName);
-        if (!boost::filesystem::exists(outputPath.parent_path()))
+        fs::path outputPath(outputFileName);
+        if (!fs::exists(outputPath.parent_path()))
         {
             std::cerr << "Directory [" << outputPath.parent_path().c_str() << "] does not exist" << std::endl;
             return false;
@@ -172,8 +170,6 @@
         return -1;
     }
 
-    namespace fs = boost::filesystem;
-
     const std::string fileFormat(".raw");
 
     const std::string rawDirectory(cmdline.GetInputDirectory());