feat: Allow skipping config check when installing NGINX from an OS repo

[alessfg]

Proposed changes

Add a parameter, nginx_skip_os_install_config_check, to turn off the NGINX config check handler when installing NGINX from the respective distribution package manager. This should help avoid potential issues where the default NGINX config that ships with a distribution is broken for some reason. Resolves #888

Checklist

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• I have read the contributing guidelines.
• I have signed the F5 Contributor License Agreement (CLA).
• If applicable, I have added Molecule tests that prove my fix is effective or that my feature works.
• If applicable, 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).

[Copilot]

Pull Request Overview

This PR adds a new parameter, nginx_skip_os_install_config_check, to disable the NGINX config check when installing from an OS repository, addressing scenarios where the default configuration might be broken.

• Updated the handler condition to include the new parameter.
• Documented the new parameter in the defaults file and updated the CHANGELOG accordingly.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
handlers/main.yml	Updated when condition to include nginx_skip_os_install_config_check, which may have a logical error in its operator precedence.
defaults/main/main.yml	Added documentation (as commented examples) for the new parameter.
CHANGELOG.md	Added an entry describing the new parameter addition.