Change el9 appliance to ship el9 based ovirt engine

[sandrobonazzola]

Up to oVirt 4.5.4 the el9 appliance rpm was shipping a vm based on CentOS Stream 8.

For next release the appliance vm should be moved to CentOS Stream 9 so the solution will be fully based on that distribution.

[sandrobonazzola]

Requires backport of #82 to ovirt-4.5 branch, @didib can you assist?

[didib]

Requires backport of #82 to ovirt-4.5 branch, @didib can you assist?

Started looking at that, and it seems like both too much work and not enough - because we did many other things in master that we actually want in 4.5 as well. So instead I propose something like https://github.com/didib/ovirt-appliance/commits/new-4.5-branch .

[michalskrivanek]

why would we need anything on 4.5 branch?can't we just move to 9 or am I missing the point?

[didib]

No idea - I do not fully understand the uses of master and 4.5 branches in this repo... @sandrobonazzola ?

[sandrobonazzola]

master consumes nightly builds from copr master repo.

ovirt-4.5 branch consumes cbs builds from testing repo at release candidate time and from centos mirrors at final release time.

If the intention is to stop building for el8, yes we can just switch 4.5 branch to el9 instead of building both. @michalskrivanek what's the expectation for 4.5.5 ?