Update dv volume path in test compose file

Changed the dv volume mount in docker-compose-test-all.yml to use an absolute path based on ${PWD} for improved reliability and consistency.

Author: JR-1991

docker/docker-compose-test-all.yml

@@ -8,7 +8,7 @@ services:
       - dataverse
     volumes:
       - ${PWD}:/pydataverse
-      - ../dv:/dv
+      - ${PWD}/dv:/dv
     command:
       - sh
       - -ceu