Write 2024/3 cycle test plan for MuSR test setup

docs/cycle_20243_testing_on_musr.md

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+# Cycle 2024/3 testing on MuSR
+
+## Kubernetes based deployment of pipeline components
+
+Verify that:
+
+- Pipeline components can be created and function correctly once started (i.e. start, and process data from Kafka)
+- Relevant components (i.e. event formation) can be scaled and message processing functions as expected (i.e. messages are processed only once and distributed across all instances)
+- Pipeline components can be terminated without failure
+
+## Prometheus based monitoring
+
+Verify that:
+
+- Redpanda metrics are collected
+- Metrics of pipeline components are collected
+- Metrics are written correctly to InfluxDB via Telegraf