Problem
====
No way to filter operators by SR and get alerts in Grafana dashboards

Solution
====

Modify existed metrics
-----------------------
Add parameter `module name` to the grafana Dashboard (MEV Monitoring) as depicted in the below image:

To implement this, add the parameter `module_name` in `lido-mev-monitoring/src/jobs/indexing/indexing.metrics.ts` at the following methods:
- collectProposeStatusMetrics
- collectFeeRecipientMetrics
- collectDeltaBalanceMetrics
- collectZeroValueMetrics
- collectUnpaidBlocksMetrics
- collectPayloadSourceMetrics

---

Adjust existing alerts by adding new field `$labels.module_name` into the following files as well as with tests for them:
- mev-monitoring-delta-balance.rule.yml
- mev-monitoring-payload-source.rule.yml
- mev-monitoring-proposal.rule.yml
- mev-monitoring-unknown-fee-recipient.rule.yml