Use a uniform way to get the local path of the binaries (#10211)

Signed-off-by: bo.jiang <bo.jiang@daocloud.io>

roles/network_plugin/cni/tasks/main.yml

@@ -9,7 +9,7 @@
 
 - name: CNI | Copy cni plugins
   unarchive:
-    src: "{{ local_release_dir }}/cni-plugins-linux-{{ image_arch }}-{{ cni_version }}.tgz"
+    src: "{{ downloads.cni.dest }}"
     dest: "/opt/cni/bin"
     mode: 0755
     remote_src: yes