Add support for suse and sles in packaging/distros
HPE uses SLES in some of our products. It would be helpful to us to be able to generate rpms for SLES. As OpenSUSE is closely aligned to SLES and is a free OS I wanted to add that too.

Describe alternatives you've considered
RHEL tinged rpms can be hacked to work with SLES but I prefer not to do that if possible.

Additional context
I have a fork with Dockerfiles that build in SLES and opensuse. We did some testing of the built rpm on a SLES system.

What tests are suggested/required?

In packing/test-release-packages.sh there is support for apt and yum. I think another section for zypper would need to be added. Same for adding a update-zypper-repo.sh script. Is there anything else needed?