ci: start integrating go 1.18 into the CI pipelines

What does this MR do?

Note: this doesn't bump the go version (we can't do that yet) but testing on newer versions is a requirement for the update process.

TODO

• I added the Changelog trailer (e.g. Changelog: added) to the commits that need to be included in the changelog
• I added unit tests or they are not required
• I added acceptance tests or they are not required
• I added documentation (or it's not required)
• I followed code review guidelines
• I followed Go Style guidelines