Keep searching when image is not present

Created by: junotx

General remarks

This form is to report bugs. For general usage questions refer to our Slack channel KubeSphere-users

Describe the bug When created deployment and input image did not exist, the search continued without indication that the image cannot be found

Versions used(KubeSphere/Kubernetes) KubeSphere: 3.0.0(2020-07-21)

Expected behavior There should be an indication that it cannot be found if the image does not exist

/assign @leoendless