Missing diagram for traces in solution overview and unclear description of traces

[kasia-kujawa]

Missing diagram for traces in solution overview, traces are now enabled by default.

Description of traces in https://github.com/SumoLogic/sumologic-kubernetes-collection/blob/main/docs/opentelemetry-collector.md#traces is rather unclear, e.g. it is hard to figure out that tracesSampler is part of tracing configuration.