Bump golang 1.19.8 to 1.19.9
Update https://gitlab.com/gitlab-org/gitlab-build-images/-/blob/master/scripts/lib/custom-docker-build to use 1.19.9 instead of 1.19.8
Update https://gitlab.com/gitlab-org/gitlab-build-images/-/blob/master/scripts/lib/custom-docker-build to use 1.19.9 instead of 1.19.8