[13.x] [meta] Set Drupal 13 platform and browser requirements at least 6 months before release

Problem/Motivation

Confirm requirements for Drupal 13.

Policies

• Set platform requirements.
• Supported browser approval.
• Set PHP requirements.

Proposed resolution

Define some 'not less than' minimum version requirements for Drupal 13.

1. PHP

   • Add results of applying the policy to set PHP requirements.

2. Databases

   • MySQL
   • MariaDB
   • sqlite
   • PostgreSQL

3. Browser

   • Add any changes from applying the policy to sets supported browsers.