Upgrading Keda to match the go.mod dependencies in operator and executor (#7067)

Author: vtaskow

testing/scripts/Makefile

@@ -120,7 +120,7 @@ install_istio:
 .PHONY: install_keda
 install_keda:
 	# Server-side apply avoids storing the huge CRD manifest in annotations.
-	kubectl apply --server-side --force-conflicts -f https://github.com/kedacore/keda/releases/download/v2.12.0/keda-2.12.0.yaml
+	kubectl apply --server-side --force-conflicts -f https://github.com/kedacore/keda/releases/download/v2.17.3/keda-2.17.3.yaml
 	kubectl wait --timeout=2m --for=condition=available deployment/keda-operator -n keda
 
 .PHONY: create_namespaces