Add RPM registry (#23380)
Fixes #20751
This PR adds a RPM package registry. You can follow [this
tutorial](https://opensource.com/article/18/9/how-build-rpm-packages) to
build a *.rpm package for testing.
This functionality is similar to the Debian registry (#22854) and
therefore shares some methods. I marked this PR as blocked because it
should be merged after #22854.
