Exclude http 4.x from http extension if possible.

[JiriOndrusek]

Camel 4.x upgraded http client to version 5.x. Quarkus apache-http-client brings 4.x.
Package names are distinct, therefore there is no problem having both of them onclasspath.
Unfortunately it is highly error prone. So I suggest to exclude client 4.x from the http extension.
(I'm not sure if it is a simple task or not -> that's why I created this ticket)
Idea if other extensions depend on http, we might need to create http4 extension.