Auto Instrumentation not Supporting Flink

[dfercode]

Is your feature request related to a problem? Please describe.

Use java annotation @WithSpan and @SpanAttribute in flink application operators(e.g. keyby operator) will create new trace rather than use same trace, seems ot java agent is not able to injectt trace_id span_id into flink data piplines.
Suggestions:
e.g. flink operator will be source from kafka -> filter(@WithSpan) -> keyby ->map(@WithSpan) ->sink
same massage will generate new traces in fliter operator and map operator when message pass throught flink pippline, but I want same msg generated spans just have one trace_id

Describe the solution you'd like

1. support auto instrumentation in flink
2. support set remote trace_id and span_id in @SpanAttribute, so that new span can link to remote trace.

Describe alternatives you've considered

No response

Additional context

No response

[laurit]

We'd welcome a contribution for this. You should consider whether support for distributed tracing could be better implemented inside flink.