chore(dev): remove unused policies volume & set named volumes (#18491)

Author: miketheman

docker-compose.yml

@@ -3,8 +3,9 @@ volumes:
   packages:
   packages-archive:
   sponsorlogos:
-  policies:
   caches:
+  postgres_data:
+  redis_data:
   rstuf-metadata:
   pgdata:
   cachedata:
@@ -28,6 +29,7 @@ services:
       - ./dev/example.sql.xz:/example.sql.xz:z
       - ./dev/db/post-migrations.sql:/post-migrations.sql:z
       - ./bin/wait-for-db:/usr/local/bin/wait-for-db:z
+      - postgres_data:/var/lib/postgresql/data/
 
   stripe:
     image: stripe/stripe-mock:v0.162.0
@@ -97,7 +99,6 @@ services:
       - packages:/var/opt/warehouse/packages
       - packages-archive:/var/opt/warehouse/packages-archive
       - sponsorlogos:/var/opt/warehouse/sponsorlogos
-      - policies:/var/opt/warehouse/policies
       - simple:/var/opt/warehouse/simple
       - ./bin:/opt/warehouse/src/bin:z
       - ./requirements:/opt/warehouse/src/requirements:z