✨ cdiz-collector: use logfmt with traceid

[davidB]

1. make a PR to init_tracing_opentelemetry::tracing_subscriber_ext to support logfmt and configurable log level
2. switch cdviz-collector to use logfmt when available on init_tracing_opentelemetry
3. use verbosity to configure tracing & log

    //TODO use verbosity to configure tracing & log, but allow override and finer control with RUST_LOG & CDVIZ_COLLECTOR_LOG (higher priority)
    //TODO use logfmt format (with traceid,...) see [tracing-logfmt-otel](https://github.com/elkowar/tracing-logfmt-otel)
    init_tracing_opentelemetry::tracing_subscriber_ext::init_subscribers()?;