CI: label VirtualMachineInstance with PR id and pipeline ids (#12716)

Helps with CI debuggability

tests/cloud_playbooks/roles/packet-ci/templates/vm.yml.j2

@@ -14,6 +14,8 @@ metadata:
     kubevirt.io/size: small
     ci_job_id: "{{ ci_job_id }}"
     ci_job_name: "{{ lookup('ansible.builtin.env', 'CI_JOB_NAME_SLUG') }}"
+    ci_pipeline_id: "{{ lookup('ansible.builtin.env', 'CI_PIPELINE_ID') }}"
+    ci_pr_id: "{{ lookup('ansible.builtin.env', 'PR_ID') }}"
   # leverage the Kubernetes GC for resources cleanup
   ownerReferences:
   - apiVersion: v1