fix(deployment-project): fetch artifacts in monitor

What

The monitor job has been broken for some time (see example job). This is because runwayctl is trying to determine the path to the Runway manifest file but because it doesn't have the artifact ZIP file, it doesn't have the Runway YAML files.

Fix: this MR adds a line into monitor job's script to import and unzip the artifacts from the service project.

See example of:

• before fix: https://gitlab.com/gitlab-com/gl-infra/platform/runway/deployments/schin1-ai-assist-1579xx/-/jobs/7252734897
• after fix: https://gitlab.com/gitlab-com/gl-infra/platform/runway/deployments/schin1-ai-assist-1579xx/-/jobs/7252868485

Why

To fix the monitor job:

team#301 (closed)