Add runner logs into fluentd-archiver configuration

Runner logs are not getting archived. It appears they were removed some time ago:

!189 (diffs)

They should be added back in to the pubsub topics:

https://gitlab.com/gitlab-com/gl-infra/k8s-workloads/tanka-deployments/-/blob/master/lib/gitlab/pubsub-topics.libsonnet?ref_type=heads#L1-17

• tanka-deployments 👉 !1207 (merged)
• config-mgmt 👉 https://ops.gitlab.net/gitlab-com/gl-infra/config-mgmt/-/merge_requests/11497