IVGCVSW-4621 Add CL FILL Workload

* Add CL workload for Fill Operator
* Enabled Fill operator tests on CL
* CLFill function does not have validate() function yet
  IsLayerSupported() function return true at the moment
* Enabled int32 to tests on backends

Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Change-Id: I9f8cc6d1c86f832ba46a8d170572f4cfcde9ab17
diff --git a/src/backends/cl/workloads/ClWorkloads.hpp b/src/backends/cl/workloads/ClWorkloads.hpp
index 5c81079..99f3e62 100644
--- a/src/backends/cl/workloads/ClWorkloads.hpp
+++ b/src/backends/cl/workloads/ClWorkloads.hpp
@@ -18,6 +18,7 @@
 #include "ClDequantizeWorkload.hpp"
 #include "ClDivisionFloatWorkload.hpp"
 #include "ClExpWorkload.hpp"
+#include "ClFillWorkload.hpp"
 #include "ClFloorFloatWorkload.hpp"
 #include "ClFullyConnectedWorkload.hpp"
 #include "ClGatherWorkload.hpp"