Migrate Zipkin model to OTEL contrib

[yurishkuro]

Part of #6408

opentelemetry-collector-contrib repo has a shared module pkg/translator/zipkin/ which currently imports these Jaeger sub-modules (among others like model):

• github.com/jaegertracing/jaeger/model/converter/thrift/zipkin
• github.com/jaegertracing/jaeger/thrift-gen/zipkincore

The proposal is to move both of these modules to OTEL/contrib.

• Analyze and list which functions are used by Jaeger from these modules, e.g. by following rg 'jaegertracing.*zipkin' (rg=ringrep)
• implement thrift-gen/zipkincore in OTEL/contrib/pkg/translator/zipkin/
• Move model/converter/thrift/zipkin code to OTEL/contrib -- done in Migrate jaeger model/converter/thrift/zipkin open-telemetry/opentelemetry-collector-contrib#37796
• Depends on Remove dependency on cmd/agent from OTEL Collector contrib #6704
• Update Jaeger code to reference that module instead of internal (after otel release) Replace use of model/converter/thrift/zipkin #6859

[won-js]

@yurishkuro
Hello, may I try to work on this issue?

[yurishkuro]

feel free to pick it up

[yurishkuro]

outstanding:

$ rg jaegertracing/jaeger/model
receiver/zipkinreceiver/trace_receiver_test.go
21:	zipkin2 "github.com/jaegertracing/jaeger/model/converter/thrift/zipkin"