Fix FIPS prepare feature on CentOS Stream 8

[The-Mule]

Python and Ansible versions on CentOS Stream 8 (ie. on RHEL-8 too) do no support dnf ansible module and we need to use command module to install the dependencies.

Pull Request Checklist

• implement the feature
• write the documentation
• extend the test coverage
• update the specification
• adjust plugin docstring
• modify the json schema
• mention the version
• include a release note

[gemini-code-assist]

Summary of Changes

Hello @The-Mule, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a compatibility issue with FIPS preparation on CentOS Stream 8 (and RHEL 8) by adjusting the Ansible playbook. It ensures that necessary cryptographic policy packages are installed correctly on these systems, circumventing limitations with the dnf Ansible module by directly executing dnf commands for RHEL 8 while maintaining module usage for RHEL 9.

Highlights

• RHEL 8 FIPS preparation fix: Modified the FIPS preparation playbook to use the command module for installing dependencies on RHEL 8 (and CentOS Stream 8) due to dnf module compatibility issues with Python and Ansible versions on these systems.
• RHEL 9 FIPS preparation: Separated the RHEL 9 FIPS dependency installation to continue using the dnf Ansible module, as it is compatible with RHEL 9, ensuring proper package management for newer versions.

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[gemini-code-assist]

Code Review

The pull request successfully addresses the issue of dnf module incompatibility on CentOS Stream 8 by switching to the command module for RHEL8. This is a pragmatic workaround given the constraints. However, the changed_when condition for the command module task can be improved to ensure proper idempotency reporting.

[LecrisUT]

/packit build

[tcornell-bus]

LGTM, works when I target a rhel-8.10 machine