Add new repo update executions for alma9 repos based on OS
Summary
This MR updates the CI so that we can publish Alma9 rpms in the public stable/testing repositories described at https://gitlab.cern.ch/cta/operations/-/issues/1296#note_7754822 .
The testing
repository will allow the CTA community to test early versions of CTA at their own risk. The stable
repository will replace the old /cta-{4..5}
directory structures for Alma9 and later.
Requires manual tests in pre-production
No
References
https://gitlab.cern.ch/cta/operations/-/issues/1296#note_7754822