* CNPG: Implement version pinning, automatic manifest URL derivation, and optional operator upgrades.
* CNPG: Add installation and management of the kubectl-cnpg plugin with architecture detection.
* k3s: Update etc/init_cloudnative_pg.sh to support configurable CNPG operator versions.
* Ansible: Enhance cgroups and k3s roles with improved check mode support and more robust variable defaults.
* Ansible: Improve kernel command-line path selection logic in the cgroups role.
Co-authored-by: Junie <junie@jetbrains.com>
