Add PHP 8.4 and 8.5 end of life dates to PhpRequirements

Problem/Motivation

  /**
   * The expected PHP version end-of-life dates, keyed by PHP minor version.
   *
   * The array keys are in 'major.minor' format, and the date values are in ISO
   * 8601 format.
   *
   * @var string[]
   *   An array of end-of-life dates in ISO 8601 format, keyed by the PHP minor
   *   version in 'major.minor' format. The list must be sorted in an ascending
   *   order by the date. Multiple versions EOL on the same day must be sorted
   *   by the PHP version.
   */
  private static $phpEolDates = [
    '8.3' => '2027-12-31',
  ];

Steps to reproduce

Proposed resolution

Add the end of life dates for 8.4 and 8.5.

Remaining tasks

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet