use lowest possible p/w hash "work factor" in test env

symfony/security-bundle/5.3/config/packages/security.yaml

@@ -25,3 +25,16 @@ security:
     access_control:
         # - { path: ^/admin, roles: ROLE_ADMIN }
         # - { path: ^/profile, roles: ROLE_USER }
+
+when@test:
+    security:
+        password_hashers:
+            # By default, password encoders are resource intensive and take time. This is
+            # important to generate secure password hashes. In tests however, secure hashes
+            # are not important, waste resources and increase test times. The following
+            # reduces the work factor to the lowest possible values.
+            Symfony\Component\Security\Core\User\PasswordAuthenticatedUserInterface:
+                algorithm: auto
+                cost: 4 # Lowest possible value for bcrypt
+                time_cost: 3 # Lowest possible value for argon
+                memory_cost: 10 # Lowest possible value for argon