IVGCVSW-7575 Implement opaque delegate for ArgMinMax operator

* Added Opaque ArgMinMax and associated test cases

Signed-off-by: John Mcloughlin <john.mcloughlin@arm.com>
Change-Id: I098b94cc35707370a0bbc7456bfdd48bb47432f0
diff --git a/delegate/CMakeLists.txt b/delegate/CMakeLists.txt
index 7dc89d7..3c5033a 100644
--- a/delegate/CMakeLists.txt
+++ b/delegate/CMakeLists.txt
@@ -259,6 +259,8 @@
              common/src/test/DelegateTestInterpreterUtils.hpp
              opaque/src/test/ArmnnOpaqueDelegateTest.cpp
              opaque/src/test/DelegateTestInterpreter.cpp
+             test/ArgMinMaxTest.cpp
+             test/ArgMinMaxTestHelper.hpp
              test/BatchSpaceTest.cpp
              test/BatchSpaceTestHelper.hpp
              test/CastTest.cpp