Migrate S3 backups from AWS, fix automatic cleanups

The cleanups were broken in that every single archive was also copied to
a shared folder and never deleted from there.

Co-authored-by: Greg Karékinian <greg@karekinian.com>

data_bags/credentials/backup.json

@@ -1,27 +1,38 @@
 {
   "id": "backup",
   "s3_access_key_id": {
-    "encrypted_data": "emGNH4v7TTEh05Go/DsI3k7CFnaK4p/4JxodC4BYpyWw47/Z3dsuRMu4vXM3\n3YLH\n",
-    "iv": "Dau+ekb3UTYdl8w3fQKVcA==\n",
-    "version": 1,
-    "cipher": "aes-256-cbc"
+    "encrypted_data": "245TrPvuoBRRTimhbt6qqsFb+JnnD377sPt1pguJy7Q2BXOy/jrX0wyMt+cP\nuA==\n",
+    "iv": "ylmRxSRO3AA4MSJN\n",
+    "auth_tag": "45tBcYZowPLrbv4Zu2P0Fw==\n",
+    "version": 3,
+    "cipher": "aes-256-gcm"
   },
   "s3_secret_access_key": {
-    "encrypted_data": "Mxyly86JxrWUbubbSiqPdRosChzfI1Q8eBEG4n+2B9JJG4yExltO5Wc5kgSs\nX01MPXAc+PGLm+J9MngUtypo/g==\n",
-    "iv": "WRhBJGiuScYYsUsoT5j/UA==\n",
-    "version": 1,
-    "cipher": "aes-256-cbc"
+    "encrypted_data": "jDIOjlBzTkBUzpj243T6KnBuH0qwyW7BUFMcqllljFSzxs7K8wYJOUreNbOP\ny8OpDWAuO0H4O4LuFMJXeM8=\n",
+    "iv": "PzvZr37EkJqz6JtM\n",
+    "auth_tag": "e3XW8oHVgmYibv/IBzj0yA==\n",
+    "version": 3,
+    "cipher": "aes-256-gcm"
+  },
+  "s3_endpoint": {
+    "encrypted_data": "ErJIEChxrreW7WKEwRtuP2MyYlsZRtqLdGa/x5QY58qgO036FgR3Hs2Z3yce\n",
+    "iv": "HOSAOgUjO7XGwk50\n",
+    "auth_tag": "XE1bwMIXHHE72V9K2KOLnw==\n",
+    "version": 3,
+    "cipher": "aes-256-gcm"
   },
   "s3_region": {
-    "encrypted_data": "2ZGxu0tVzKNfx3K1Wleg0SAwGaPkHCi/XfKpJ+J7q40=\n",
-    "iv": "CNTZW2SEIgfw+IyzGI3TzQ==\n",
-    "version": 1,
-    "cipher": "aes-256-cbc"
+    "encrypted_data": "8cNSaYu7HH95ftG66lFdUIPZD7soz907CPA=\n",
+    "iv": "pU21ulF75y/SIs3x\n",
+    "auth_tag": "7WQQCbSbB2GybjY+C+5IvQ==\n",
+    "version": 3,
+    "cipher": "aes-256-gcm"
   },
   "encryption_password": {
-    "encrypted_data": "tsBWKBwhQFfEAM0EWMPtljSbqU1c5mOJXPjYJjNT5RUFhPlqa7gsE8aJbs+D\nSPKjAQ62j+iHeqCk9mE9CCkgBA==\n",
-    "iv": "uq5YAXuq2ynRLv9EIWoCFA==\n",
-    "version": 1,
-    "cipher": "aes-256-cbc"
+    "encrypted_data": "l23CiIO2s1fIRn0NdoWZ+wK+Zhx3hCYDHf4ypjqMRekZ7xqafvXHHuogD5aj\npxYUKloH\n",
+    "iv": "Dzx83eP9L7Jqqidh\n",
+    "auth_tag": "UVn5XA5Tgsikc1GdOt1MUQ==\n",
+    "version": 3,
+    "cipher": "aes-256-gcm"
   }
 }