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

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

00:05:24

59.0%
passed #246706
intel macos
build_macos_intel_38

00:18:07

59.0%