The multi-branch Pipeline run API is incorrect

Created by: LinuxSuRen

General remarks

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

Describe the bug As you can see, the API calling is incorrect.

The incorrect API address: http://ip:port/kapis/devops.kubesphere.io/v1alpha2/devops/{devops}/pipelines/{pipeline}/runs

The correct API address: http://ip:port/kapis/devops.kubesphere.io/v1alpha2/devops/{devops}/pipelines/{pipeline}/branches/{branch}/runs

/area devops /priority high

Versions used(KubeSphere/Kubernetes) KubeSphere: v3.1.0

Environment This is not an environmental issue.

To Reproduce Steps to reproduce the behavior:

1. Go to the DevOps project page
2. Create a Pipeline with Gitlab as source
3. Go to the master branch Pipeline page.
4. Click the Run button
5. Nothing happend

Expected behavior The branch Pipeline can be trigger manually.