Grafana: add a runtime/Erlang/BEAM dashboard (#12456)

* Add BEAM dashboard

Also update the other dashboards by opening in Grafana v11.2.2 and ensuring they work as expected.

* Update the Erlang-Distributions-Compare dashboard

* Update the RabbitMQ-Overview dashboard

* Update the RabbitMQ-Quorum-Queues-Raft dashboard

* Update the RabbitMQ-Stream dashboard

* Update distribution link status panel

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Co-authored-by: Michal Kuratczyk <mkuratczyk@vmware.com>