After editing the pipeline configuration, the pipeline disappears

Created by: liuyp2018

Describe the Bug

1. Create a graphical pipeline
2. Create a 'print a message' step and save the pipeline
3. Edit and save the pipeline configuration
4. the jenkinsfile missing

https://user-images.githubusercontent.com/36271543/144353693-099e29bc-253b-4a69-8818-7315cdf44f0d.mp4

Versions Used KubeSphere: kubespehre v3.2.1-rc.1 Kubernetes: (If KubeSphere installer used, you can skip this)

/assign @johnniang /area devops /kind bug /priority High