chore(e2e-env): add a dockerized e2e-env support

[jokesterfr]

Description

Adds an e2e environment with prestashop-flashlight to ps_eventbus.

How to test it

cd ./tests/e2e-env
docker compose up -d

curl 'http://localhost:8000/index.php?fc=module&module=ps_eventbus&controller=apiHealthCheck'            
{"prestashop_version":"8.1.2","ps_eventbus_version":"0.0.0","ps_accounts_version":"0.0.0","php_version":"8.1.26","ps_account":false,"is_valid_jwt":false,"ps_eventbus":true,"env":{"EVENT_BUS_PROXY_API_URL":"http://reverse-proxy/collector","EVENT_BUS_SYNC_API_URL":"http://reverse-proxy/sync-api","EVENT_BUS_LIVE_SYNC_API_URL":"http://reverse-proxy/live-sync-api/v1"},"httpCode":200}