Callback usage removal

[vietj]

Remove the usage of deprecated callbacks

• docs and examples, it must be back-ported to 4.x

• implementation of vertx

• tests

• [x] vertx-core

• [x] vertx-web

• [x] vertx-sql-client

• [x] vertx-uri-template

• [x] vertx-stomp

• [x] vertx-tracing

• [x] vertx-shell

• [x] vertx-proton

• [x] vertx-amqp-client

• [x] vertx-json-schema

• [x] vertx-redis-client

• [x] vertx-auth

• [x] vertx-mongo-client

• [x] vertx-kafka-client

• [x] vertx-micrometer-metrics

• [x] vertx-mail-client

• [x] vertx-mqtt

• [x] vertx-dropwizard-metrics

• [x] vertx-reactive-streams

• [x] vertx-health-check

• [x] vertx-circuit-breaker

• [x] vertx-service-discovery

• [x] vertx-hazelcast

• [x] vertx-infinispan

• [x] vertx-zookeeper

• [x] vertx-cassandra-client

• [x] vertx-config

• [x] vertx-camel-bridge

• [x] vertx-tcp-event-bus-bridge

• [x] vertx-bridge-common

• [x] vertx-consul-client

• [x] vertx-rabbitmq-client

• [x] vertx-jdbc-client

• [x] vertx-ignite

• [x] eclipse-vertx/vertx-grpc

• [x] vert-x3/vertx-grpc

• [x] vertx-service-proxy

[tsegismont]

Please do not update the issue's description for a moment. I'm going to update the list using the list we've built in the callback deprecation issue.

[tsegismont]

Done

[vietj]

thanks @tsegismont , I'm on SQL client

[vietj]

there is a linked PR

[vietj]

I'll take care of both vertx-grpc