[REVERT LATER] temporarily include skopeo in verify step for faster feedback

Author: cheesesashimi

Makefile

@@ -119,9 +119,7 @@ else
 	./hack/install-skopeo.sh
 endif
 
-# install-skopeo is purposely omitted from this target because it is only
-# needed for a single test target (test-e2e-ocl).
-install-tools: install-golangci-lint install-go-junit-report install-setup-envtest
+install-tools: install-golangci-lint install-go-junit-report install-setup-envtest install-skopeo
 
 # Runs golangci-lint
 lint: install-tools