Delete open-telemtry from ops-gitlab-gke

What

Remove open-telemetry from ops-gitlab-gke:

➜  reliability git:(mchacon-remove-open-telemetry) flux diff kustomization reliability-overlays --path overlays/gke/gitlab-ops/us-east1/ops-gitlab-gke
✓  Kustomization diffing...
► ConfigMap/open-telemetry/reliability-overlay-open-telemetry-values-ops-gitlab-gke deleted
► Kustomization/flux-system/reliability-components-open-telemetry deleted
⚠️ identified at least one change, exiting with non-zero exit code
➜  reliability git:(mchacon-remove-open-telemetry)

Why

Related Issue: https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/24591