Clean up defunct upload and CRL logic.

- Applies our previous CSP namespacing pattern to the upload classes.
- Removes code and config for previous uploader implementation.
- Removes Attachment model's ability to upload files directly and
  adjusts tests that expected that behavior.

config/base.ini

@@ -3,9 +3,6 @@ CAC_URL = http://localhost:8000/login-redirect
 CA_CHAIN = ssl/server-certs/ca-chain.pem
 CLASSIFIED = false
 COOKIE_SECRET = some-secret-please-replace
-CRL_STORAGE_CONTAINER = crls
-CRL_STORAGE_PROVIDER = LOCAL
-CRL_STORAGE_REGION = iad
 DISABLE_CRL_CHECK = false
 CRL_FAIL_OPEN = false
 DEBUG = true
@@ -28,10 +25,5 @@ SESSION_COOKIE_NAME=atat
 SESSION_TYPE = redis
 SESSION_USE_SIGNER = True
 SQLALCHEMY_ECHO = False
-STORAGE_CONTAINER=uploads
-STORAGE_KEY=''
-STORAGE_SECRET=''
-STORAGE_PROVIDER=LOCAL
-STORAGE_CRL_ARCHIVE_NAME = dod_crls.tar.bz
 WTF_CSRF_ENABLED = true
 LIMIT_CONCURRENT_SESSIONS = false