Update role to latest supported OSes and include license support

[aknot242]

Proposed changes

This PR updates the role to reflect the current set of supported NGINX App Protect WAF and DoS distributions, adds NGINX Plus JWT license support, and fixes a range of Molecule CI issues that prevented the test suite from running.

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Features

• NGINX Plus JWT license support: Added jwt field to the nginx_app_protect_license variable (required for NGINX Plus R33+). Updated main.yml, all Molecule converge.yml playbooks, and the README to document the new NGINX_JWT environment variable for CI workflows.

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Enhancements

• Updated supported distribution lists in main.yml, main.yml, and README.md:
  • WAF: Added Alpine 3.22, Amazon Linux 2023, Debian 11/12, Oracle Linux 8, RHEL 9/10, Rocky Linux 8/9, Ubuntu 22.04/24.04. Removed Amazon Linux 2, Debian 10, Ubuntu 18.04/20.04.
  • DoS: Added Alpine 3.21/3.22, Amazon Linux 2023, Debian 11/12, RHEL 9, Rocky Linux 8/9, Ubuntu 22.04/24.04. Removed Debian 10, Ubuntu 18.04/20.04.
• Bumped dependency versions in README.md: ansible.posix → 2.0.0, community.general → 10.7.0, community.crypto → 2.26.2, community.docker → 4.6.0.
• Replaced deprecated variables: ansible_service_mgr → ansible_facts['service_mgr'] and ansible_python['version']['major'] → ansible_facts['python']['version']['major'] in task files.
• Updated copyright year to 2026.

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Bug Fixes

• Molecule ANSIBLE_ROLES_PATH: Added env: ANSIBLE_ROLES_PATH to all Molecule scenarios (advanced, default, dos, specific-version, uninstall) so the role under test is correctly resolved during converge.
• Molecule remote_tmp: Added remote_tmp: /tmp/.ansible/tmp to all scenario provisioner.config_options.defaults to fix temporary directory creation failures in containers.
• RHEL/Oracle Linux Python interpreter: Added ansible_python_interpreter: /usr/libexec/platform-python host vars for rhel-8 and oraclelinux-8 in the default scenario to prevent Ansible from selecting Python 3.11, which lacks dnf bindings on those platforms.

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CI/CD

• Updated all Molecule scenario platforms to replace removed distributions (ubuntu:focal, amazonlinux:2, alpine:3.17, rhel-ubi8:8.7) with currently supported ones.
• Added FROM --platform=linux/amd64 to Dockerfile.j2 to ensure correct platform images are built when running Molecule on Apple Silicon (arm64) hosts.
• Added systemd and python3-cryptography to the dnf install layer in Dockerfile.j2 for Amazon Linux 2023 / RHEL-family containers.
• Added NGINX_JWT handling to all Molecule prepare playbooks (common/prepare.yml, advanced/prepare.yml, uninstall/prepare.yml).
• Added wait_for_connection to prepare.yml to allow systemd to finish booting before Ansible connects.
• Updated recommended Molecule version in README.md from 4.x to 26.x.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• I have added Molecule tests that prove my fix is effective or that my feature works
• I have checked that any relevant Molecule tests pass after adding my changes
• I have updated any relevant documentation (defaults/main.yml, README.md and CHANGELOG.md)