Use default MariaDB 10.11

Problem/Motivation

DDEV v1.23.0 has a default database of mariadb:10.11 (current LTS MariaDB).

Drupalpod is overriding that with mariadb:10.6

Steps to reproduce

Start any project

Proposed resolution

Use the default value instead of overwriting it.

Remaining tasks

User interface changes

API changes

Data model changes