Camel K Golang 1.18 upgrade

[Antonin Stefanutti]

Hello Camel(K) Riders,

Happy new year!

We've just upgrade Golang to version 1.18 on main branch [1], so you may have 
to upgrade your local tooling for development.

Cheers,
Antonin

[1] https://github.com/apache/camel-k/pull/3963