Release package - All PR's should be against original/rpms/rocky-release

## Notes for Packagers/Builders

This package produces both stable packages of `rocky-release`
(`rocky-release`, `rocky-repos`, `rocky-gpg-keys`) as well as `rocky-release-lookahead`
(all packages appended with `-lookahead`). By default, it only produces the
"stable" version of the packages.

When building the package, the `rllh` macro can define the behavior of the
build:

* If `rllh` is set to `0` or is undefined, the stable packages are built
* If `rllh` is set to a number higher than `0`, the lookahead packages are built

When `rllh` is set to something higher than `0`, the minor version will
typically be `y+1`. So if the current stable os `X.0`, the next would be `X.1`.
For pre-releases, both packages should produce `X.0` until changed in the spec.

The `rllh` macro may be versioned out for future use.

A `rllh_minor` macro may be introduced in the future.

### How does this benefit us?

It allows us to track future minor releases from Stream and see how it will
affect us going forward. When a minor release is being branched, the "lookahead"
files can just be copied and a new "stable" release is made in preparation. The
beta of each RHEL tends to stick around for a month before a release is done,
which makes it easier to make sure everything "stays in line" for the most part.

### What about after the five year mark?

LookAhead will no longer be produced as the major version will then me in
maintenance only mode.