Use names specified by OpenTelemetry for tags

[tsegismont]

In Vert.x 4, tag names should follow the OpenTracing specification (by convention).

OpenTracing is now deprecated: opentracing/specification#163

In Vert.x 5, tag names should follow the OpenTelemetry specification

This might require to remove/add some adapter code in vertx-tracing (see #70)

Possibly impacted modules

• Vert.x core Use names specified by OpenTelemetry for tags vert.x#5331
• SQL Clients Use names specified by OpenTelemetry for tags vertx-sql-client#1468
• Redis Client Use names specified by OpenTelemetry for tags vert-x3/vertx-redis-client#476
• Cassandra Client Use names specified by OpenTelemetry for tags vert-x3/vertx-cassandra-client#86
• Kafka Client Use names specified by OpenTelemetry for tags vert-x3/vertx-kafka-client#276
• Vert.x Tracing Use names specified by OpenTelemetry for tags #81

[tsegismont]

@vietj how about deprecating OpenTracing in Vert.x 4 and removing in Vert.x 5 ?

[vietj]

I think we should keep it at least for vertx 5 without publishing docs