Fix rules for fips downstream pipeline
requested to merge taucher2003-group/secondary-forks/security-products-ci-templates:fix/downstream-fips-rules into master
What does this MR do?
The test-custom-ca-bundle fips job tries to get triggered in Fork Pipelines and fails due to missing permissions. This fixes the rules for that job, to only trigger on gitlab-org branches. They have been taken from the .downstream_rules section.