feat: add ability to read new file format

i'm introducing 2 things here:
- the ability to read the output of the new ta cache rollups code in
  the new location in GCS
- the ability to read multiple versions of the new rollup file
    - its probable that the "no version" file never exists in prod GCS
      but i'd like to establish this pattern in the code nonetheless

i also add metrics

Author: joseph-sentry

docker-compose.yml

@@ -45,8 +45,6 @@ services:
   minio:
     image: minio/minio:latest
     command: server /export
-    ports:
-      - "${MINIO_PORT:-9000}:9000"
     environment:
       - MINIO_ACCESS_KEY=codecov-default-key
       - MINIO_SECRET_KEY=codecov-default-secret

docker/test.yml

@@ -23,6 +23,7 @@ services:
     access_key_id: codecov-default-key
     secret_access_key: codecov-default-secret
     verify_ssl: false
+    bucket: archive
     port: 9000
     host: minio