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/RefConstantWorkload.cpp b/src/backends/reference/workloads/RefConstantWorkload.cpp
index 6290237..571dbb2 100644
--- a/src/backends/reference/workloads/RefConstantWorkload.cpp
+++ b/src/backends/reference/workloads/RefConstantWorkload.cpp
@@ -18,7 +18,7 @@
 
 RefConstantWorkload::RefConstantWorkload(
     const ConstantQueueDescriptor& descriptor, const WorkloadInfo& info)
-    : BaseWorkload<ConstantQueueDescriptor>(descriptor, info) {}
+    : RefBaseWorkload<ConstantQueueDescriptor>(descriptor, info) {}
 
 void RefConstantWorkload::Execute() const
 {