seperate neo4j and memgraph queries

code/eval/queries/cypher/driver_latest/cypher_queries.py

code/eval/queries/cypher/memgraph/Dockerfile

code/eval/queries/cypher/memgraph/memgraph_queries.py

code/eval/queries/cypher/neo4j/Dockerfile

code/eval/queries/cypher/neo4j/neo4j_queries.py