[gitlab-ci] Use project based include rather than hardcoded path

2 jobs for gitlab_relative_include in 18 minutes and 11 seconds
Status Name Job ID Coverage
  Build
passed build_linux_38 #246707
docker-build

00:05:24

59.0%
passed build_macos_intel_38 #246706
macos intel

00:18:07

59.0%