Use the new API of the pipeline artifacts

**What would you like to be added**:

Change the API calling of pipeline artifacts from:

`/kapis/devops.kubesphere.io/v1alpha2/jenkins/job/cly-devops7846x/job/test-pipeline/2/artifact/target/devops-sample-0.0.1-SNAPSHOT.jar` to

`GET /kapis/devops.kubesphere.io/v1alpha2/pipelineruns/demo-artifact-tt85n/artifacts?filePath=xxx.log`

**Why is this needed**:
See the details of the background from https://github.com/kubesphere/ks-devops/issues/449

The upstream issue is https://github.com/kubesphere/ks-devops/issues/449

## References
* https://github.com/kubesphere/ks-devops/issues/449

/area devops
/good-first-issue

Start by locating the existing pipeline-artifact API call in the ks-devops codebase and read the background in upstream issue 449. Update the call to use the pipelineruns artifacts endpoint described here, then verify that pipeline artifact retrieval still works with the new filePath query parameter.

Written by the indexing model from the issue text.