Bump `cosl` so charms that rely on it for generic alert rules have updated alert rules

[sinapah]

This is a tracking issue.

A recent PR #162 made generic alert rules more detailed to resolve #160. cosl should be bumped where charms rely on it for their generic alert rules (namely, any charm which instantiates a MetricsEndpointProvider or a PrometheusRemoteWriteConsumer.

The list of charms where this will be necessary (PR links to be updated):

1. Grafana Agent: chore: implement new prometheus remote write requirements grafana-agent-operator#343
2. Grafana Agent K8s: chore: implement new prometheus remote write requirements grafana-agent-k8s-operator#423
3. Otel Collector: chore: implement new prometheus remote write requirements opentelemetry-collector-operator#130
4. Otel Collector K8s: chore: implement new prometheus remote write requirements  opentelemetry-collector-k8s-operator#148
5. Coordinated workers: chore/bump-cosl cos-coordinated-workers#114
6. Alertmanager K8s:
7. Prometheus K8s: chore: bump-cosl prometheus-k8s-operator#754
8. Tempo operators (only the coordinator needs the change): chore: implement new prometheus remote write lib requirements tempo-operators#248
9. Mimir coordinator: chore: bump cosl and fetch remote write lib mimir-coordinator-k8s-operator#199
10. To be completed