- Updating AMIs to Ubuntu 24.04LTS.

• Updating UserData to fix pip install for cfnsignal
• Removing need to explicitly declare PHP 8.3. PHP 8.3 is the default version for Ubuntu 24.04LTS
• Adding assert.active = Off to Dockerfile. assert.active is deprecated and can return a PHP warning. This shows up during a Drupal cache clear.

Closes #3518837