[FEATURE REQUEST]: Adding Alert Manager Icon

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### Description

About the icon
Alertmanager is a core component of the Prometheus monitoring ecosystem responsible for managing alerts generated by Prometheus servers. It helps operations teams reduce noise and ensure timely response by deduplicating, grouping, and routing alerts to the appropriate notification channels without the need for custom scripting. Alertmanager supports silencing, inhibition rules, and flexible templating for notifications to email, Slack, PagerDuty, and other receivers, making it essential for reliable and scalable alerting in modern observability stacks.

### Context

https://prometheus.io/docs/alerting/latest/alertmanager/

### Possible Solution


You can use this icon as svg format

### Additional information

_No response_