Change the artifact download link on the Pipeline run page

Created by: LinuxSuRen

What type of PR is this?

/kind feature /area devops

What this PR does / why we need it:

It's not good to use any Jenkins API directly.

See https://github.com/kubesphere/ks-devops/pull/479

Which issue(s) this PR fixes:

Fixes #

Special notes for reviewers:

Does this PR introduced a user-facing change?

None

Additional documentation, usage docs, etc.: