devel/gitlab-runner: update to 18.0.0

In this version I patched out a replace instruction in go.mod to work-around
a build problem with the port in FreeBSD.
After it is working fine, I will try to address that solution here:
https://gitlab.com/gitlab-org/gitlab-runner/-/issues/38761

Changes: https://gitlab.com/gitlab-org/gitlab-runner/-/blob/main/CHANGELOG.md
(cherry picked from commit 8b344cff4b7c23019635a2c78f9b4c11715132ce)