Use the MacOS-x64 CI-machine managed by the IT-Cloud group

assigned to @a.nejati

added 5 commits

• 2fdbb358...0e5725b7 - 3 commits from branch main
• 7d673b12 - GitLab-CI: use the new MacOS-x64 CI-machine managed by the IT-Cloud group
• 18f40336 - GitLab-CI: fix Homebrew directory

Compare with previous version

mentioned in commit 0786002c

merged