Simpler support for Drupal 10

Problem/Motivation

In concert with work on #3445832: Host Drupal 10 on Aegir 3 → , I'm creating a ticket here so I can create a Provision branch that implements Steven Jones's solution for hosting Drupal 10 on Aegir 3,

This is an intentional duplicate of 🐛 Drupal 10 support for Aegir 3 Needs work that takes a lighter approach.

Proposed resolution

Here are the Aegir features I want to ensure work:

• Platform build
• Site install
• Site backup
• Site restore
• Site clone
• Site migration