Fix CI pipeline

After the lxir116 went out of operation there were no runner for the CI merge stage any longer. Cretae a new runner on run4 which will execute this stage instead of lxir116. Most of the changes were done on the GitLab server and the runner node. With this MR only the environment variables are adapted.

Fixes #3639, #3640

added BugFix CI/CD labels

requested review from @p.-a.loizeau

assigned to @f.uhlig

Dear @f.uhlig, @v.friese, @p.-a.loizeau,

you have been identified as code owner of at least one file which was changed with this merge request.

Please check the changes and approve them or request changes.

added CodeOwners label

merged

changed the description

resolved all threads