Add conditionals for Rhel9 in common role

[AswathySK]

The common role for Unix playbook doesnt include conditionals for rhel9 causing playbook failures.

Failures caused due to current condition:

• EPEL release not enabled for rhel9
• packags included in Installing additional build tools if NOT RHEL 8 task is applicable for rhel9 as well. For example NTP is replaced by chronyd.
• Additional build tools for rhel 8 is also required by rhel 9

Checklist

• commit message has one of the standard prefixes
• faq.md updated if appropriate
• other documentation is changed or added (if applicable)
• playbook changes run through VPC or QPC (if you have access)
• VPC/QPC not applicable for this PR
• for inventory.yml changes, bastillion/nagios/jenkins updated accordingly

[AdamBrousseau]

@AswathySK can we make these conditions smarter so we don't have to keep updating them every time a new OS is released? Or do we prefer to leave it like this so we can test the new major OS releases?

[AswathySK]

@AdamBrousseau instead of changing conditional to do it for everything greater than or equal to rhel 8 instead?
There could be change in package dependencies for the future releases.
So how to make the change right now is up to the community I suppose.