fix: add schema rules for 'baseurl' and 'metalink' in yum repo config (#5501)
Jira: https://issues.redhat.com/browse/RHEL-46873
At least one of (or both) 'baseurl' or 'metalink' should be provided for yum
repository specification. Add schema changes to enforce it. Without this,
with just 'metalink' property set, one would get the schema validator error
\---
Error: Cloud config schema errors: yum_repos.epel-release: 'baseurl' is a required property
\---
Signed-off-by: Ani Sinha <anisinha@redhat.com>
(cherry picked from commit 7d35664ef8b85840f92f18cc48187f7284d227bc)
C10s MR: !100 (closed)