Adopt `endpoint` as the way to define the connection destination for HTTP and MQTT. Replacing parameters `host` and `port`

[orianar]

We currently configure HTTP and MQTT with separate host and port parameters. To simplify and unify the configuration with the Kafka connection feature introduced in issue #4666, we propose replacing them (host and port) with a single endpoint parameter in both connections.

Do you have the intention to implement the solution

• Yes, I have the knowledge to implement this new feature.
• Yes, but I will need help.
• No, I do not have the skills.

[fgalan]

Let's see how Copilot performs on this... :)