Make it easier to run performance tests locally

Problem/Motivation

Follow-up for 📌 Add performance testing Active .

Running performance tests needs an additional step when setting up a Drupal CMS development environment: ddev get ddev/ddev-selenium-standalone-chrome

Additionally, we could maybe pull in ddev-gander to have the grafana dashboard etc. by default, or document how to add that when desired.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes