IVGCVSW-4513 Remove boost/algorithm/string *

 * Removed split, classification, trim, string, join, contains
 * Added StringUtils.hpp to replace the removed Boost String functionality


Signed-off-by: David Monahan <david.monahan@arm.com>
Change-Id: I8aa938dc3942cb65c512cccb2c069da66aa24668
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9697a5a..9e31a03 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -251,6 +251,7 @@
     include/armnn/utility/IgnoreUnused.hpp
     include/armnn/utility/NumericCast.hpp
     include/armnn/utility/PolymorphicDowncast.hpp
+    include/armnn/utility/StringUtils.hpp
     profiling/common/include/SocketConnectionException.hpp
     src/armnn/layers/LayerCloneBase.hpp
     src/armnn/layers/LayerWithParameters.hpp