Observability - Helm chart releases

[katriendg]

• New helm chart OtelCollection (Opentelemetry collector, fluentbit)
• New helm chart EdgeObservability: for level 4 with data stores Tempo, Jaeger, Prometheus, and Grafana UI for local visualization on edge
• Changes to existing charts:
• • DNSMasqAks - additional custom domains
• • Envoy: expose Prometheus for self metrics endpoint, add Otel Collector filter and cluster (for child clusters)
• • Workloads L2 and L4 - Dapr additional config for tracing and metrics
• • Mosquitto - logging
• GitHub Helm release workflow updates to allow for chart dependencies in release flow

Note this PR has more detailed documentation (part of a forthcoming PR): https://github.com/katriendg/distributed-az-edge-framework/blob/observability/docs/observability.md