Refactor Forced Import

 * Find and replace all workloads associated with imported IO
 * Only attempt tensorhandle replacement if supported by all workloads
 * Add new RefBaseWorkload to enable forced input for ref backend
 * Store imported tensorhandles in preImportedTensorhandles instead of outputHandles
 * Create pre-imported tensorhandles at network load-time
 * Front load import workload validation to load network time
 * Only call ReplaceTensorHandle when needed

Change-Id: I3816a71b7f57ae90388bb16462a75d4ef3544fa7
Signed-off-by: Finn Williams <finn.williams@arm.com>
diff --git a/src/backends/reference/workloads/RefElementwiseUnaryWorkload.cpp b/src/backends/reference/workloads/RefElementwiseUnaryWorkload.cpp
index be15363..3ea51b9 100644
--- a/src/backends/reference/workloads/RefElementwiseUnaryWorkload.cpp
+++ b/src/backends/reference/workloads/RefElementwiseUnaryWorkload.cpp
@@ -27,7 +27,7 @@
 
 RefElementwiseUnaryWorkload::RefElementwiseUnaryWorkload(const ElementwiseUnaryQueueDescriptor& desc,
                                                          const WorkloadInfo& info)
-    : BaseWorkload<ElementwiseUnaryQueueDescriptor>(desc, info)
+    : RefBaseWorkload<ElementwiseUnaryQueueDescriptor>(desc, info)
 {}
 
 void RefElementwiseUnaryWorkload::Execute() const