rhel-version: EOL for Minor-Releases

[koraz-0815]

Describe the solution you'd like

The plugin will check if the Minor-Version is in Extended Update Support and the EOL of this Minor Version.
https://access.redhat.com/support/policy/updates/errata#RHEL8_Planning_Guide
https://access.redhat.com/support/policy/updates/errata/#Extended_Update_Support
For example:
8.4: CRITICAL: EOL 31.05.2023
8.6: OK: EOL 31.05.2024
8.8: OK: EOL 31.05.2025

Additional context

No response

[markuslf]

The plugin checks against https://endoflife.date/rhel, and offers some parameters to control handling major, minor or patch updates, too (see https://github.com/Linuxfabrik/monitoring-plugins/tree/main/check-plugins/rhel-version for details). Checking ExtendedSupport is currently not supported by the plugin.

[koraz-0815]

The plugin checks against https://endoflife.date/rhel

It ist possible to use a own website?
for example

    {
        "cycle": "88",
        "eol": "2025-05-31",
    },
        {
        "cycle": "86",
        "eol": "2024-05-31",
    },
    {
        "cycle": "84",
        "eol": "2023-05-31",
    },

[markuslf]

No.

[slalomsk8er]

Maybe https://cve.tuxcare.com/rss_feed/releases could be added