Clean up resources by using correct yaml path (#7855)
Clean up resources by using correct yaml path (#7855)

This patch changes yaml path to cleanup resources.

In test scripts, all resources are generated in `${TMP_DIR}` directory and
replaced the namespaces. Hence, we need to use the replaced yaml file
to cleanup resources.

e.g You can see find following errors in any build log.
```
Error from server (NotFound): error when deleting "test/config/autotls/certmanager/selfsigned/config-certmanager.yaml": configmaps "config-certmanager" not found
Error from server (NotFound): error when deleting "test/config/autotls/certmanager/http01/config-certmanager.yaml": configmaps "config-certmanager" not found
Error from server (NotFound): error when deleting "test/config/autotls/certmanager/http01/mesh-issuer.yaml": clusterissuers.cert-manager.io "http01-issuer" not found
```
knative/serving,knative/serving