try to use mysql already installed in testrunner

.github/workflows/test_e2e.yml

@@ -123,7 +123,10 @@ jobs:
         uses: oven-sh/setup-bun@v2
 
       - name: Boot up test system | docker-compose mariadb mailserver
-        run: docker compose -f docker-compose.yml -f docker-compose.test.yml up --detach mariadb mailserver
+        run: docker compose -f docker-compose.yml -f docker-compose.test.yml up --detach mailserver
+      
+      - name: Start mysql 
+        run: sudo systemctl start mysql.service
 
       - name: Prepare test system
         run: |

backend/.env.test_e2e

@@ -6,6 +6,10 @@ HUMHUB_ACTIVE=false
 GMS_ACTIVE=false
 USE_CRYPTO_WORKER=true
 
+# DB
+DB_USER=root
+DB_PASSWORD=root
+
 # Email
 EMAIL=true
 EMAIL_TEST_MODUS=false