[Feature] - *Use OT-Collector service graphs processor for SDG*

[SaschaBrechmannVHV]

Is your feature request related to a problem? Please describe.
The OT-Collector has now a Service Graphs Processor, with uses OTLP Metrics to generate Service-Graphs from SPANs

Describe the solution you'd like
Add this Service-Graph Metrics to inspect-IT SDG, so one could see SPANs / Metrics from pure OT-Instrumentation with no inspect-IT Agent.

Additional context
OT-Collector Service Graphs Processor