[jaeger v2] Service Performance Monitoring

[yurishkuro]

Part of #5240

Jaeger-v1 implements a functionality known as SPM, but it requires a separately running OpenTelemetry Collector to produce metrics out of spans using SpanMetrics Connector. Since Jaeger-v2 is built on top of OTEL Collector, we can run SpanMetrics Connector directly in the Jaeger binary and simplify the setup for the users.

• Expected Outcome: Achieve parity in SPM of jaeger-v2 compared to jaeger-v1. Implement integration tests. Update documentation accordingly.
• Extra credit: implement metrics reader directly on top of Elasticsearch/Opensearch and bypass the need for Prometheus.

[yurishkuro]

Separate issue #5608 opened for integration tests, considering this one finished.